Engineering Drawing

GSFC X-673-64-1F

ENGINEERING DRAWING STANDARDS MANUAL

August 1994

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AND SPA ICS C UT

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M AD

AERO N

INISTRA TIO

AL ON TI

U. S. A.

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X-673-64-1FSupersedes GSFC X-673-64-1E/July 1991

ENGINEERING DRAWING STANDARDS MANUALMechanical Engineering Branch Goddard Space Flight Center Greenbelt, Maryland

August 1994

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S AND SPA C TIC U

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M AD

AL AERON

INISTRA TIO

ON TI

U. S. A.

National Aeronautics and Space Administration Goddard Space Flight Center Greenbelt, Maryland 20771 1994

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DESCRIPTION OF REVISION T h i s r e v i s i o n , w h i c h s u p e r s e d e s t h e G o d d ar d S p a c e F l i g h t C e n t e r ( G S F C ) S t a n d a r d X - 6 7 3 - 6 4 - 1 E , E n g in e e r in g D r a win g S ta n d a r d s M a n u a l, is in te n d e d to u p d a te a n d r e f le c t th e la te s t f o r ma ts a n d s ta n d a r d s a d o p te d b y G S F C. T h e f o llo w in g is a s u mma r y o f th e p r in c ip a l c h a n g e s a n d imp r o v e me n ts in c o r p o r a te d in this issue: a. A d d itio n o f Co mp o s ite Ma te r ia l D r a w in g d e f in itio n .

b . C h a n g in g o f t h e s i g n a t u r e t o a p r i n t e d n a me i n T i t l e b lo c k s . c. N e w e x a mp l e o f t h e M e t r i c D r a w i n g s f o r ma t a n d t o l e r a n c e p r e s e n t a t i o n .

d . I mp r o v e d p l a c e me n t o f v i e w s o n T y p e s o f D r a w i n g s s a mp l e s t o p r e v e n t u n n e c e s s a r y r e w o r k o f d r a w in g s a t a la te r d a te . e. f. N e w E n g in e e r i n g O r d e r ( E O ) f o r ms a d d e d ; o ld E O f o r ms w i l l b e p h a s e d o u t. A d d itio n a l n o te s o n v a r io u s to p ic s a d d e d to N o te E x a mp le s s e c tio n .

g . D e le tio n o f mic r o f ilmin g r e q u ir e me n ts f o r d r a w in g f o r ma t. h . F lo w c h a r t f o r f lig h t p r o j e c ts r e d e f in e d .

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PREFACE T h e G S F C E n g in e e r in g D r a win g S ta n d a r d s M a n u a l i s t h e o f f i c i a l s o u r c e f o r t h e r e q u ir e me n ts a n d in te r p r e ta tio n s to b e u s e d in th e d e v e lo p me n t a n d p r e s e n ta tio n o f e n g in e e r in g d r a w in g s a n d r e la te d d o c u me n ta tio n f o r th e G S F C. T h e M e c h a n i c a l E n g i n e e r i n g B r a n c h , M e c h a n i c a l S y s t e ms D iv is io n , h a s b e e n d e le g a te d t h e r e s p o n s i b i l i t y f o r i n t e r p r e t a t i o n , p e r i o d ic u p d a t e s , a n d d i s t r ib u t i o n o f t h e G S F C E n g in e e r in g D r a win g S ta n d a r d s M a n u a l. A ll E n g in e e r in g D ir e c to r a te d e s ig n o r g a n iz a tio n s a n d th e ir c o n tr a c to r s s h a ll a d h e r e to th e r e q u ir e me n ts o f th is ma n u a l w h e n p r e p a r in g G S F C e n g in e e r in g d o c u me n ta tio n f o r f lig h t h a r d w a r e a n d g r o u n d s u p p o r t s ys te ms . Co mme n ts o r in q u ir ie s c o n c e r n in g th is ma n u a l s h o u ld b e d ir e c te d to th e Me c h a n ic a l E n g in e e r in g Br a n c h , Co d e 7 2 2 .

D r . A lla n S h e r ma n D ir e c to r o f E n g in e e r in g

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TABLE OF CONTENTSINTRODUCTION ....................................................................................................... 1 1. DRAWING ELEMENTS .......................................................................................... 3 1.1. Drawing Sizes ................................................................................................. 3 1.2. Multisheet Drawings ........................................................................................ 3 1.3. Zoning ............................................................................................................ 4 1 . 4 . T i t l e B l o c k an d R e v i s i o n B l o c k . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1 . 5 . D r a w i n g F o r ma t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0 2. NOMENCLATURE ................................................................................................ 11 2.1. Drawing Title ................................................................................................. 11 2.2. Abbreviations ................................................................................................. 12 2.3. List of Material .............................................................................................. 14 2 . 3 . 1 . R e q u i r e me n t s o n t h e B o d y o f t h e D r a w i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 2 . 3 . 2 . R e q u i r e me n t s i n t h e L i s t o f M a t e r i a l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 2.4. Notes on Drawings .......................................................................................... 15 2 . 4 . 1 . S e c u r i t y C l a s s i f i c at i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5 2.4.2. Note Location........................................................................................ 15 2 . 4 . 3 . N u mb e r i n g o f N o t e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6 2 . 4 . 4 . N o t e E x a mp l e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6 2 . 4 . 4 . 1 . D i me n s i o n N o t e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6 2.4.4.2. Heat Treating Notes.................................................................... 17 2 . 4 . 4 . 3 . J o i n i n g Me t h o d N o t e s ( w e l d i n g , b r a z i n g , e t c . ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 8 2.4.4.4. Plating and Coating Notes ........................................................... 18 2.4.4.5. Surface Preparation Notes ........................................................... 19 2.4.4.6. Testing and Inspection Notes ....................................................... 20 2.4.4.7. Threaded Inserts Cleaning and Installation Notes ....................... 20 2.4.4.8. Miscellaneous Notes ................................................................... 21 2 . 4 . 4 . 9 . I n f o r ma t i o n a l N o t e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 2.4.5. Local Character Notes ............................................................................ 23 2 . 4 . 6 . G e n e r a l D i me n s i o n a l T o l e r a n c e N o t e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 2 . 5 . S p e c i f i c a t io n C a l l o u t s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 3. DRAFTING PRACTICES ....................................................................................... 25 3.1. General .......................................................................................................... 25 3.2. Lines ............................................................................................................. 25 3.2.1. Ink Lines and Plotted Lines .................................................................... 25 3.2.2. Pencil Lines .......................................................................................... 27 3.2.3. Types of Lines....................................................................................... 27 3.2.3.1. Center Lines .............................................................................. 27 3 . 2 . 3 . 2 . D i me n s i o n L i n e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 8 3.2.3.3. Leaders ..................................................................................... 28 3.2.3.4. Break Lines ............................................................................... 28 3.2.3.5. Phantom Lines ........................................................................... 29 3.2.3.6. Sectioning Lines ........................................................................ 29 3.2.3.7. Extension Lines ......................................................................... 30 3.2.3.8. Hidden Lines ............................................................................. 30 3.2.3.9. Stitch Lines ............................................................................... 30 3.2.3.10. Outlines or Visible Lines........................................................... 30 3.2.3.11. Datum Lines ............................................................................ 30 3 . 2 . 3 . 1 2 . C u t t i n g - P l a n e / V ie w i n g - P l a n e L i n e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 0 3 . 3 . L e t t e r i n g a n d N u me r a l s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1 3.3.1. Style .................................................................................................... 31 3.3.2. Heights ................................................................................................. 32 3.4. Scale ............................................................................................................. 32 3.5. Positioning the Part on the Drawing .................................................................. 33

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3.5.1. Picturization ......................................................................................... 33 3.5.2. Sections ................................................................................................ 34 3.5.3. Views ................................................................................................... 36 3.5.4. Details.................................................................................................. 37 3 . 5 . 5 . I d e n t i f i c a t i o n o f S e ct i o n s , V i e w s , a n d D e t a i l s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 3 . 5 . 6 . L o c a t i n g S e c t i o n s, V i e w s , a n d D e t a i l s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 8 TYPES OF DRAWINGS ......................................................................................... 39 4.1. Altered or Selected Vendor Part Drawing .......................................................... 39 4 . 2 . A s s e mb l y D r a w i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 0 4.3. Detail Drawing ............................................................................................... 41 4.4. Drawing Tree ................................................................................................. 42 4 . 5 . E l e c t r i c a l / E l e c tr o n i c D r a w i n g s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 4 . 5 . 1 . E l e c t r i c a l a n d E l e c t r o n i c S y mb o l s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 4 . 5 . 2 . E l e c t r i c a l a n d E l e c t r o n i c D i a g r a ms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 4 . 6 . I n s e p a r a b l e A s s e mb l y D r a w i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4 4 . 7 . I n s t a l l a t i o n A s s e mb l y D r a w i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5 4.8. Interface Control Drawing ............................................................................... 46 4.9. Matched-Set Drawing ...................................................................................... 48 4 . 1 0 . M e c h a n i c a l S c h e ma t i c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 9 4.11. Modification Drawing .................................................................................... 51 4.12. Outline Drawing ........................................................................................... 51 4.13. Source Control Drawing ................................................................................. 53 4 . 1 4 . S p e c i f i c a t i o n Co n t r o l D r a w i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 4.15. Standard Part Drawing ................................................................................... 56 4.16. Tabulated Drawing ........................................................................................ 56 4.17. Tooling Drawing ........................................................................................... 57 4 . 1 8 . C o mp o s i t e M a t e r i a l D r a w i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8 NUMBERING SYSTEM FOR DRAWINGS AND SUPPORTING DOCUMENTATION . 60 5 . 1 . P a r t N u mb e r i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1 5 . 2 . F i n d o r I t e m N u mb e r i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 5.3. Order of Precedence of Specifications and Standards .......................................... 62 5.3.1. Group I ................................................................................................. 62 5.3.2. Group II ............................................................................................... 62 5.3.3. Group III .............................................................................................. 63 5.3.4. Group IV .............................................................................................. 63 5.3.5. Group V................................................................................................ 63 ENGINEERING ORDER ........................................................................................ 64 6 . 1 . G e n e r a l R e q u i r e me n t s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 6 . 2 . F o r ma t S a mp l e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 DRAWING REVISIONS ......................................................................................... 68 7 . 1 . R e v i s i o n Me t h o d s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8 7.2. Revision Identification .................................................................................... 68 7.3. Revision of Multisheet Drawings ...................................................................... 68 7.4. Revision Recording ......................................................................................... 68 7.5. Redrawn or Replaced Drawings ........................................................................ 70 PARTS LIST AND INDEX LIST ............................................................................. 71 8.1. Definitions ..................................................................................................... 71 8 . 2 . R e q u i r e me n t s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1 8.2.1. List Preparation ..................................................................................... 71 8 . 2 . 2 . L i s t F o r ma t s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 8.2.3. Revision Identification ........................................................................... 72 8 . 2 . 4 . D e l e t i n g I t e ms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 8 . 2 . 5 . A d d i n g I t e ms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 8.3. Cover Sheet.................................................................................................... 72 8 . 3 . 1 . F o r ma t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2

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8.3.2. Entries.................................................................................................. 72 8 . 4 . P a r t s L i s t Co n t i n u a t i o n S h e e t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 8 . 4 . 1 . F o r ma t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 8.4.2. Entries.................................................................................................. 75 8 . 5 . I n d e x L i s t Co n t i n u a t i o n S h e e t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 7 8 . 5 . 1 . F o r ma t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 7 8.5.2. Entries.................................................................................................. 77 8 . 6 . F i n d o r I t e m N u mb e r S ys t e m o f I d e n t i f i c a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 9 8.6.1. Definition ............................................................................................. 79 8 . 6 . 2 . A p p l i c a t i o n a n d L i mi t a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 9 8 . 6 . 3 . D r a w i n g R e q u i r e me n t s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 0 8.7. List of Material .............................................................................................. 81 8 . 7 . 1 . F o r ma t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1 8.7.2. Entries.................................................................................................. 81 9. DOCUMENTATION MANAGEMENT ..................................................................... 82 9.1. Typical Drawing Flow for Flight Projects .......................................................... 82 9.2. Archiving....................................................................................................... 83 9 . 3 . C o mp u t e r - A i d e d D e s i g n D r a w i n g s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3 9 . 3 . 1 . P r e s e n t a t i o n o f C o mp u t e r - G e n e r a t e d D a t a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3 9 . 3 . 2 . D e v e l o p i n g a n d U s i n g C o mp u t e r - G e n e r a t e d D r a w i n g s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 9.3.3. Specification Data ................................................................................. 84 1 0 . D E S I G N R E F E R E N C E S , S TA N D A R D S , A N D S P E C I F I C A T I O N S . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 1 0 . 1 . D i me n s i o n i n g a n d T o l e r a n c i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 1 0 . 1 . 1 . D i me n s i o n i n g a n d T o l e r a n c i n g P r a c t i c e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 1 0 . 1 . 2 . S t a t e me n t s o n D i me n s i o n i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 1 0 . 2 . M e t r i c D i me n s i o n i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 1 0 . 2 . 1 . S I U n i t s a n d S y mb o l s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 10.2.2. Unit Conversions ................................................................................. 89 1 0 . 2 . 2 . 1 . C o n v e r s i o n o f D i me n s i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 9 10.2.2.2. Unit Rounding.......................................................................... 89 10.3. Design References ......................................................................................... 92 10.4. Control of Surface Roughness......................................................................... 93 10.4.1. Surface Texture ................................................................................... 93 1 0 . 4 . 2 . S u r f a c e T e x t u r e S y mb o l s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3 10.4.3. Surface Texture Standards..................................................................... 93 10.5. Thread Specifications .................................................................................... 93 10.6. WeldingFusion and Resistance ..................................................................... 95 10.6.1. General ............................................................................................... 95 1 0 . 6 . 2 . B a s i c W e l d S y mb o l s a n d T h e i r L o c a t i o n S i g n i f i c a n c e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 10.7. Outgassing of Spacecraft Materials ................................................................. 95 10.8. Standards and Specifications Index ................................................................. 96 10.8.1. National Bureau of Standards ................................................................ 96 10.8.2. Federal ............................................................................................... 96 10.8.3. Industrial ............................................................................................ 97 10.8.4. Military .............................................................................................. 98 10.8.5. NASA ............................................................................................... 100 1 0 . 9 . S t a n d a r d s a n d S p e c i f i c at i o n s N u me r i c a l I n d e x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0 1 A P P E N D I X A . D E S I G N R EV I E W D O s A N D D O N ' T s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0 7 INDEX.................................................................................................................... 110

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INTRODUCTIONT h is d r a w in g s ta n d a r d s ma n u a l e s ta b lis h e s th e c o n v e n tio n s to b e a d h e r e d to b y e n g in e e r in g a n d d r a f tin g p e r s o n n e l in th e p r e p a r a tio n , r e v is io n , a n d c o mp le tio n o f e n g i n e e r i n g d r a w i n g s . T h i s ma n u a l s e t s f o r t h t h e min i mu m r e q u i r e me n t s a c c e p t a b l e a t G S F C f o r th e p r e p a r a tio n o f e n g in e e r in g d r a w in g s f o r f lig h t h a r d w a r e a n d g r o u n d s u p p o r t s ys te ms . T h e r e q u ir e me n ts s p e c if ie d h e r e in a r e e s s e n tia l to th e s ta n d a r d iz a tio n o f p r a c tic e s a n d to a u n if o r m in te r p r e ta tio n o f d r a w in g s . A s ys te m, p a ylo a d , o r c o mp o n e n t a s s e mb ly s h a ll b e c o mp le te ly d e f in e d b y me a n s o f d r a w in g s , in c lu d in g lis ts , s c h e ma tic s , w ir in g d ia g r a ms , a n d s p e c if ic a tio n s , to e n s u r e th a t c o mp o n e n t s f a b r i c a t e d a r e i n a c c o r d a n c e w i t h t h e d e s i g n . T h e d o c u me n t a t i o n i n f o r ma t i o n s h a l l s e r v e a s a p e r ma n e n t r e c o r d . F l i g h t h a r d w a r e s h a l l b e f a b r i c a t e d i n a c c o r d a n c e w i t h t h e a p p r o v e d d e s i g n d o c u me n t s . T h e s e d o c u me n t s s h a l l r e f l e c t t h e c h a r a c t e r i s t i c s a n d a c c e p t a n c e c r i t e r i a f o r a l l ma t e r i a l s , c o mp o n e n t / p a r t s , s u b s y s t e ms , a n d t h e c o mp l e t e s y s t e m. T h e a c c e p t a n c e c r i t e r i a f o r p a r t s a n d ma t e r i a l s s h a l l b e s pe c i f i e d b y s t a n d a r d s p e c i f i c a t i o n s w h e n applicable. E n g in e e r in g d r a w in g s a r e d e f in e d a s th o s e d r a w in g s th a t c o mmu n ic a te th e r e q u ir e me n ts f o r th e ma n u f a c tu r e o f th e e n d - p r o d u c t ite ms , th e ir a s s e mb ly, a n d th e ir in s ta lla tio n in th e e n d p r o d u c t. T h e e n g in e e r in g d r a w in g s p r e p a r e d b y G S F C d e s ig n p e r s o n n e l o r c o n tr a c to r s o n G S F C d r a w in g f o r ma t u s in g G S F C d r a w in g n u mb e r s s h a ll b e k n o w n a s G o v e r n me n t D e s ig n A c tiv ity D r a w in g s . P a r ts ma d e to th e s e d r a w in g s typ ic a lly w o u ld b e ma n u f a c tu r e d th r o u g h th e F a b r ic a tio n E n g in e e r in g Br a n c h , E n g in e e r in g S e r v ic e s D iv is io n , G S F C. C o n t r a c t o r D e s i g n A c t i v i t y D ra w i n g s ( w h i c h a r e a c o mp a n y 's d r a w i n g s b e a r i n g t h e c o mp a n y n a me , a d d r e s s , f e d e r a l c o d e id e n tif ic a tio n , a n d d r a w in g n u mb e r ) s h o u ld b e u s e d w h e n t h e c o mp a n y i s d e s i g n i n g a n d d e l i v e r in g t h e f i n i s h e d p r o d u ct i n a c c o r d a n c e w i t h t h e t e r ms o f a N A S A c o n t r a c t . The Design Activity shall be defined as an activity having responsibility for the design o f a n i t e m o r s y s t e m. T h e a c t i v i t y ma y b e a g o v e r n me n t e n t i t y , a c o n t r a c t o r , a v e n d o r , o r a n o th e r o r g a n iz a tio n s u c h a s a u n iv e r s ity. A l t h o u g h g e n e r a l l y i n a c c o r d a n c e w i t h t h e D e p ar t me n t o f D e f e n s e a n d i n d u s t r y p r a c t i c e s a n d p r o c e d u r e s , th is d r a w in g s ta n d a r d s man u a l d o e s c o n ta in s p e c if ic d if f e r e n c e s a n d e x c e p t i o n s t o E n g in e e r in g D r a win g P r a c tic e s, MI L - S T D - 1 0 0 E . T h is ma n u a l, w h ile n o t in te n d e d a s a ma n u a l o f in s tr u c tio n in th e b a s ic p r in c ip le s o f d r a f tin g , d o e s s e t f o r th th e min i mu m r e q u i r e me n t s a c c e p t a b l e a t t h e G S F C. O n e o f t h o s e r e q u i r e me n t s i s t h a t p e r s o n s e n g a g e d in th e p r e p a r a tio n o f d r a w in g s s h a ll h a v e a th o r o u g h u n d e r s ta n d in g o f th e f u n d a me n ta ls o f d r a f tin g a n d g e o me tr ic a l d ime n s io n in g a n d to le r a n c in g ( in a c c o r d a n c e w i t h A N S I Y 1 4 . 5 M - 1 9 8 2 , D im e n s io n in g a n d T o le r a n c in g ) in o r d e r to p r o d u c e in te r p r e ta b le d r a w in g s .

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1. 1.1.

DRAWING ELEMENTS Drawing SizesT h e f o llo w in g ta b le d e f in e s th e s ta n d a r d d r a w in g s iz e s , a n d th e ir le tte r d e s ig n a tio n s to b e u s e d a t G S F C: Letter Designation B C D E F J Notes: ( a ) L e n g th s f o r J r o l l s i z e t o b e i n l l - i n c h i n c r e me n t s . ( b ) N o t in c lu s iv e o f a d d e d p r o te c tiv e ma r g in s o f a t le a s t 2 in c h e s o n b o th e n d s o f roll size drawings. Sheet Width (inches) 11 17 22 34 28 34 Sheet Length (inches) 17 22 34 44 40 48 to 144(a) Margin (inches) 3/8 1/2 1/2 1/2 1/2 1/2(b)

1.2.

Multisheet DrawingsM u l t i s h e e t d r a w i n g s a r e p e r mi t t e d i n a l l s i z e s . a . T h e f i r s t s h e e t o f a mu l t i s h e e t d r a w i n g s h a l l a l w a y s c o n ta i n t h e c o mp l e t e T i t l e b lo c k , L is t o f Ma te r ia l, Re v is io n Blo c k , a n d g e n e r a l n o te s . b . A l l s h e e t s o f mu l t i s h e e t d r a w i n g s s h a l l b e o f t h e s a me l e t t e r s i z e . U s e o f mu l t i s h e e t d r a w i n g s s h a l l b e f o u n d t o b e a d v a n t a g e o u s f o r c e r t a i n t y p e s o f s c h e ma tic s a n d d ia g r a ms . c. T h e s h e e ts o f J s iz e d r a w in g s ma y b e a n y o f th e a b o v e - n o te d le n g th s a n d ma y b e in te r mix e d in d if f e r e n t le n g th s .

d . S h e e t n u mb e r in g f o r a ll f ir s t s h e e ts s h a ll in c lu d e th e to ta l n u mb e r o f s h e e ts , a s S H E E T 1 O F 1 , S H E E T 1 O F 2 , e tc . N u mb e r i n g o f c o n t i n u a t i o n s h e e t s s h a l l b e l i mi t e d t o s t a t i n g t h e s p e c i f i c s h e e t n u mb e r ( e . g . , S H E E T 2 , S H E E T 3 ) w i t h o u t s p e c i f y i n g t h e t o t a l n u mb e r o f s h e e t s .

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1.3.

ZoningV e r tic a l a n d h o r iz o n ta l z o n in g ma y b e u s e d if n e c e s s a r y to p r o v id e o r ie n ta tio n to t h e f i e l d o f d r a w i n g s . Z o n in g i s ma n d a t o r y f o r mu l t i s h e e t d r a w i n g s D s i z e a n d l a r g e r a n d s i n g l e - s h e e t d r a w i n g s E s i z e an d l a r g e r . Z o n e s s h a l l b e i d e n t i f i e d b y a l p h a b e t i c a l ( u p p e r c a s e ) a n d n u me r i c a l e n t r i e s i n t h e mar g i n s p a c e s a s i n d i c a t e d in F ig u r e 1 . Z o n e s iz e s s h a ll b e 8 in c h e s ( w id th ) b y 1 1 in c h e s ( le n g th ) f o r E and J size, 7 inches (width) by 10 inches (length) for F size, and 5 inches (width) by 8 inches (length) for D size.SECURITY CLASSIFICATION 5 4 3 2 1REVISION NOTES

DRAWING NUMBER ON REVERSE SIDE FOR ROLL-SIZE DRAWINGS

APPROX. 2-INCH ADDITIONAL MARGIN FOR PROTECTION OF ROLL-SIZE DRAWINGS

D

D

C

VERTICAL ZONE IDENTIFICATION ALPHABETICALLY LETTERED FROM BOTTOM EDGE

ALTERNATE LOCATION OF GENERAL NOTES

C

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B SECURITY NOTATION (IF REQUIRED)

A 5 4 3 2

TITLE BLOCK 1

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SECURITY CLASSIFICATION

Figure 1: Format for B, C, D, E, F, and J Size Drawings

1.4.

Title Block and Revision BlockT i t l e b lo c k s a n d r e v is i o n b lo c k s s h a l l b e p r e p a r e d a n d c o mp l e t e d a s f o l l o w s : T h e T i t l e b lo c k o f s i n g le - s h e e t d r a w i n g s , f i r s t s h e e t s o f mu l t i s h e e t d r a w i n g s , a n d r e v is io n b lo c k s s h a ll a p p e a r a s s h o w n in e ith e r F ig u r e 2 a o n p a g e 5 ( d ime n s io n a l s y s t e m/ i n c h e s ) o r F i g u r e 2 b o n p a g e 6 ( d i me n s i o n a l s y s t e m/ mi l l i me t e r s ) . T h e i n f o r ma t i o n r e q u ir e d i n t h e T i t l e b lo c k s h a l l b e a s s p e c i f i e d o r r e f e r e n c e d b y i t e ms 1 t h r o u g h 2 8 , b e l o w . T h e T i t l e b lo c k o f c o n t i n u a t i o n s h e e t s f o r mu l t i s h e e t d r a w in g s s h a ll c o n ta in in f o r ma tio n lis te d in ite ms 1 , 2 , a n d 4 th r o u g h 1 1 .

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DRAWING NUMBER ON REVERSE SIDE FOR ROLL-SIZE DRAWINGS

PREFERRED LOCATION OF GENERAL NOTES

APPROX. 2-INCH ADDITIONAL MARGIN FOR PROTECTION OF ROLL-SIZE DRAWINGS

HORIZONTAL ZONE IDENTIFICATION NUMBERED FROM RIGHT-HAND EDGE


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LIST OF MATERIALNATIONAL AERONAUTICS AND SPACE ADMINISTRATION

UNLESS OTHERWISE SPECIFIED - DIMENSIONS ARE IN INCHES

TOLERANCES:.XX .02 .XXX .005 1 FRACTIONS 1/16 125

Goddard Space Flight CenterINIT DATE

GREENBELT, MARYLAND

NAME DESIGNER

DRAWING INTERPRETED PER GSFC-X673-64-1 REMOVE ALL BURRS AND SHARP EDGES R .010 OR CHAMFER MAX.

FLIGHT HARDWARE/POST FAB HARDNESS TEST REQ'D

DRAWN

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HARDNESS TEST NOT REQUIRED

NON FLIGHTCHECKED

TEST HARDNESS PER ASTM E-18, LOCATION OPTIONAL TEST HARDNESS PER ASTM E-18 WHERE INDICATED ON FIELD OF DRAWING THUS NO NON-DESTRUCTIVE EXAMINATION (NDE) REQ'D NDE REQUIRED PER S-313-009 CODETHIS DRAWING WAS PRODUCED USING SOFTWARE: FILE NAME: VERSION:

APPROVED

APPROVED

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GDCODE SCALE WT. SH

APPROVED-ENGINEER NEXT ASSY USED ON

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Figure 2a: Sample Title and Revision Block (Enlarged View) for Dimensional System/Inches

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17ITEM NO REQD REQD PART NO DESCRIPTION MATERIAL MATERIAL SPEC & NO

LIST OF MATERIALFLIGHT HARDWARE/POST FAB HARDNESS TEST REQ'D HARDNESS TEST NOT REQUIRED NON FLIGHTNAME INIT DATE DRAWING INTERPRETED PER GSFC-X673-64-1DESIGNER

METRIC HYBRIDMETRIC/INCHTHIRD ANGLE PROJECTION

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION

Goddard Space Flight Center

GREENBELT, MARYLAND

TEST HARDNESS PER ASTM E-18, LOCATION OPTIONAL TEST HARDNESS PER ASTM E-18 WHERE INDICATED ON FIELD OF DRAWING THUSDRAWN

NON-DESTRUCTIVE EXAMINATION (NDE) NOT REQD NDE REQUIRED PER S-313-009 CODEUNLESS OTHERWISE SPECIFIED DIMENSION ARE IN MM DIMENSION TOLERANCES 2 DECIMAL 1 DECIMAL DECIMAL ANGLE RAD/CHAM 0.25 0.5 1 1 0.5 FINISH IN MICROMETERS THIS DRAWING WAS PRODUCED USING SOFTWARE: VERSION:

TITLE

CHECKED

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Figure 2b: Sample Title and Revision Block (Enlarged View) for Dimensional System/Millimeters

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1 2

DRAWING NO.: See page 60. SH OF on sheet 1. : E n t e r s h e e t n u mb e r a s a p p l ic a b l e . I n d i c a t e t o t a l s h e e t s o n l y

3 4

W T : E n te r u n it w e ig h t c a lc u la te d a t time o f d e s ig n if r e q u ir e d . T I T L E : S e e p a r a g r a p h 2 . 1 o n p a g e 1 1 f o r s e le c tio n a n d a r r a n g e me n t o f drawing title. See paragraph 3.3.2 on page 32 for drawing title size. S C A L E : E n te r s c a le . S e e p a r a g r a p h 3 . 4 o n p a g e 3 2 f o r s e le c tio n o f s c a le . CODE: For drawings prepared by the Goddard Space Flight Center (GSFC) w ith a n o f f ic ia l G S F C d r a w in g n u mb e r , e n te r th e th r e e - d ig it G S F C c o d e id e n tif yin g th e g r o u p r e s p o n s ib le f o r th e d r a w in g . F o r d r a w in g s p r e p a r e d b y a c o n tr a c to r w ith a c o n tr a c to r d r a w in g n u mb e r a n d f o r ma t, th e c o n tr a c to r 's c o d e n u mb e r f r o m th e Co mme r c ia l a n d G o v e r n me n t E n t i t y ( C A G E ) P u b l i c a t i o n H 4 / H 8 ( f o r me r l y F e d e r a l S u p p ly Co d e fo r M a n u fa c tu r e r s ( F S C M ) H 4 a n d F e d e r a l S u p p ly Co d e s fo r No n - M a n u fa c tu r e r s ( F S C N M) H 8 ) s h a l l a p p e a r .

5 6

7 8 9

DATE: Enter date of initials. D E S I G N E R : E n t e r d e s i g n e r ' s p r i n t e d n a me a n d i n i t i a l s . D R A W N : E n te r d r a f ts ma n 's p r in te d n a me o r if d r a w n b y th e d e s ig n e r , th e d e s ig n e r s p r in te d n a me ma y b e r e p e a te d .

1 0 C H E C K E D : E n t e r d e s i g n a n a l y s t ' s p r i n t e d n a me . T h i s n a me s h a l l b e a n in d e p e n d e n t n a me f r o m a ll o th e r n a me s o n th e d r a w in g . I t r e p r e s e n ts th a t th e d r a w in g h a s b e e n c h e c k e d a g a in s t th e p a r a me te r s o f th is d r a w in g ma n u a l a n d , w h e r e p o s s i b le , t o f o r m, f i t , f u n c t i o n , a n d f e a s i b i l i t y . T h e c h e c k e r mu s t h a v e a th o r o u g h u n d e r s ta n d in g o f th e me th o d s a n d p r a c tic e s o f g e o me tr ic tolerancing and be able to specify such practices in accordance with ANSI S ta n d a r d Y 1 4 . 5 M- 1 9 8 2 , D im e n s io n in g a n d T o le r a n c in g . 1 1 A P P R O V E D : E n te r th e p r in te d n a me s o f G S F C p e r s o n n e l a s s ig n e d to a p p r o v e th e d r a w in g . P r o j e c t r e q u ir e me n ts f o r d r a w in g n a me s s h a ll v a r y f r o m p r o g r a m t o p r o g r a m, b u t e a c h n a me s h a l l b e i d e n t i f i e d . F o r e x a mp l e , a f t e r e a c h a p p r o v a l n a me , n o te th e f o llo w in g : E N G f o r e n g in e e r , S T RE S S f o r s tr e s s e n g in e e r , Q A f o r q u a l i t y a s s u r a n c e e n g in e e r , M A T L f o r ma t e r i a l s e n g i n e e r , E L E C f o r e l e c t r ic a l e n g i n e e r , e t c . A l l n a me s i n l i n e i t e ms 8 t h r o u g h 1 1 mu s t b e l e g i b l e . T h e h a n d -w r i t t e n i n i t i a l s o n t h e p a p e r o r i g i n a l a r e t h e o f f i c i a l a p p r o v a l o f t h a t d o c u me n t . 1 2 U S E D O N : E n te r a c r o n ym n a me o f p r o g r a m a n d a c r o n ym n a me o f s u b s ys te m o r e x p e r ime n t w h e r e a p p lic a b le .

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1 3 N E X T A S S Y : E n t e r d r a w i n g n u mb e r o n w h i c h t h e p a r t i s n e x t u t i l i z e d , mo d if ie d , o r a s s e mb le d . I n th e c a s e o f to o lin g d r a w in g s , in th e N e x t A s s e mb ly b lo c k r e f e r to a g e n e r a l n o te th a t s ta te s T h is d r a w in g is u s e d to f a b r ic a te ( d r a w in g n u mb e r ) . I n s ta lla tio n d r a w in g s s h o u ld r e f le c t a to p c o n f ig u r a tio n d r a w in g n u mb e r a s th e n e x t a s s e mb ly. W h e n a c o n f ig u r a tio n d r a w in g is n o t b e in g p r o d u c e d , th e in s ta lla tio n d r a w in g s h a ll in d ic a te b y n o te T h e in s ta lla tio n f o r ms a p a r t o f th e c o n f ig u r a tio n f o r p r o g r a m ( p r o j e c t n a me ) . 1 4 E X A MI N A T I O N : T h e a p p r o p r i a t e N o n - D e s t r u c t i v e E x a mi n a t i o n ( N D E ) Re q u ir e d b lo c k s h a ll b e c h e c k e d o f f , an d th e a d d itio n o f th e a p p lic a b le c o d e o r s e e n o te X X s h a ll b e a d d e d w h e r e r e q u ir e d . Re f e r to T e s tin g a n d I n s p e c tio n N o te s o f th e g e n e r a l n o te s s e c tio n p a r a g r a p h 2 . 4 . 4 . 6 o n p a g e 2 0 . 1 5 F L I G H T H A R D W A R E a n d H A R D N E S S T E S T I N G : T h e F lig h t H a r d w a r e b lo c k mu s t b e c h e c k e d o f f w h e n th e p a r t is u s e d in a c tu a l f lig h t c o n f ig u r a tio n s . T h e a p p r o p r ia te H a r d n e s s T e s tin g b lo c k s h a ll b e c h e c k e d o f f r e g a r d l e s s o f w h e t h e r th e p a r t is f lig h t h a r d w a r e o r n o t. 1 6 O n CA D - p r o d u c e d d r a w in g s , a d d a 3 . 5 - in c h - lo n g b y 0 . 8 8 - in c h - h ig h b lo c k a s follows:

THIS DRAWING WAS PRODUCED USING: SO F T W A R E: (a) F IL EN A M E: (c) Notes: ( a ) S o f t w a r e u s e d ( e x a mp l e : A U T O C A D ) ( b ) V e r s i o n o f s o f t w ar e ( e x a mp le : 1 0 c 7 ) ( c ) F ile n a me ( e x a mp le : G S F C1 2 3 4 ) 1 7 ME T R I C / H Y B R I D ME T R I C - I N C H : A d d X t o t yp e o f d r a w i n g b l o c k . A A A A 1 8 I T E M N O . : E n te r ite m n u mb e r s w h e n mo r e th a n o n e typ e o f ma te r ia l o r p a r t is r e q u ir e d , a n d c o o r d in a te d r a w in g c a llo u ts o n th e d r a w in g f ie ld . P a r ts ma d e o f th e s a me ma te r ia l, c o n d itio n , a n d s p e c if ic a tio n s h a ll b e a s s ig n e d o n ly o n e ite m n u mb e r , e v e n th o u g h th e p a r t ma y b e r e q u ir e d in v a r io u s s iz e s a n d t h i c k n e s s e s . T h e q u a n t i t y f o r s u c h i t e ms i n t h e L i s t o f M a t e r i a l ( L / M ) s h a l l b e s t a t e d a s A / R w i t h t h e s p e c i f i c s i z e s s pe lle d o u t in th e f ie ld o f th e d r a w in g . Re f e r to F ig u r e 3 o n p a g e 1 0 , F ig u r e 3 4 o n p a g e 8 0 , a n d S e c tio n 8 . 6 , F in d o r I te m N u mb e r S ys te m o f I d e n tif ic a tio n , o n p a g e 7 9 . D o n o t s k ip ite m n u mb e r s o n n e w d r a w in g s . 1 9 R E Q D : E n t e r q u a n t i t y o f p a r t s r e q u ir e d o n ly f o r t h e p a r t s o f a n i n s e p a r a b le a s s e mb ly o r a s s e mb ly d r a w in g . 20 P A R T N O . : E n te r id e n tif yin g p a r t n u mb e r s w h e n r e q u ir e d ( G o v e r n me n t, c o n tr a c to r , v e n d o r , o r o th e r ) . O n n e w d r a w in g s , g r o u p lik e ite ms to g e th e r . VER SIO N : (b)

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21

D E S C R I P T I O N : E n t e r ma t e r i a l d e s c r i p t i o n ( p l a t e , e t c . ) o r a p a r t n a me t i t l e i f it is a n o th e r d r a w in g . E n c lo s e r e f e r e n c e i n f o r ma t i o n s u c h a s f a s t e n e r s i z e s i n brackets. M A T E R I A L : E n t e r t h e ma t e r i a l f r o m w h i c h t h e p a r t i s f a b r i c a t e d . E x a mp le s : AL ALY; CRES; BE CU.

22

2 3 M A T E R I A L S P E C . : E n t e r t h e a p p l i c a b l e ma t e r i a l s p e c i f i c a t i o n s , n u mb e r , a n d f in a l c o n d itio n . E x a mp le s : Q Q - A - 2 5 0 /1 1 6 0 6 1 - T 6 f o r A L A L Y p la te ; ASTM A582 303 COND A for CRES bar. T h e in f o r ma tio n r e q u ir e d in th e r e v is io n b lo c k s h a ll b e a s s p e c if ie d o r r e f e r e n c e d b y i t e ms 2 4 t h r o u g h 2 8 , b el o w , a n d i n a c c o r d a n c e w i t h D r a w i n g Re v is io n s , p a r a g r a p h 7 , p a g e 6 8 . 2 4 R E V I S I O N S - S Y M: E n te r r e v is io n s ymb o l. 25 REVISIONS - ZONE: Enter zone (where used). 2 6 R E V I S I O N S - D E S C R I P T I O N : E n te r d e s c r ip tio n o f th e r e v is io n ( r e f e r to S e c tio n 7 , D r a w in g Re v is io n s ) . 2 7 R E V I S I O N S - D A T E : E n te r d a te a p p r o v e d b y a u th o r iz e d s ig n e r ( s ) in b lo c k . 2 8 R E V I S I O N S - A P P R O V A L : E n te r s ig n a tu r e o f G S F C p e r s o n a s s ig n e d to a p p r o v e . I f c h a n g e w a s b y a p p r o v e d E O , d r a w in g o n ly n e e d s a p p r o v a l o f th e d r a f ts ma n o r p e r s o n in c o r p o r a tin g th e c h a n g e , a n d th e c h e c k e r . I f c h a n g e s ma d e a r e n o t c o v e r e d b y a n E O , th e n a p p r o v a l mu s t in c lu d e th e e n g in e e r .

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DETAIL DRAWINGWIRE ITEM NO. REQD PART NO. DESCRIPTION BE CU MATERIAL QQ-C-530, COND 1/2 HT MATERIAL SPEC & NO.

DETAIL SHOWN & OPPOSITE DRAWING-2 -1 ITEM NO. REQD PART NO. BAR OPPOSITE BAR SHOWN DESCRIPTION AL ALY AL ALY MATERIAL QQ-A-225/8 6061-T6 QQ-A-225/8 6061-T6 MATERIAL SPEC & NO.

INSEPARABLE ASSEMBLY DRAWING2 1 ITEM NO. 2 1 REQD PART NO. MS21209C0415 INSERT (4-40 UNC x .168 LG) PLATE DESCRIPTION AL ALY MATERIAL SEE NOTE 1 QQ-A-250/11 6061-T6 MATERIAL SPEC & NO.

INSEPARABLE ASSEMBLY DRAWING2 1 3 A/R GD1000001 ITEM NO. REQD PART NO. MS21209C0415 INSERT (4-40 UNC x .168 LG) PLATE PLATE ASSY DESCRIPTION MATERIAL MATERIAL SPEC & NO. AL ALY SEE NOTE 1 QQ-A-250/11 6061-T6

ASSEMBLY DRAWING4 3 2 1 3 2 1 1 3 2 MS51957-12 GD1003451 GC1003467-2 GC1003467-1 GE1002500-2 GE1002500-1 ITEM NO. REQD REQD PART NO. SCREW (4-40 UNC 2A x .187 LENGTH) BLOCK PLATE PLATE PADDLE ASSEMBLY OPPOSITE PADDLE ASSEMBLY SHOWN DESCRIPTION MATERIAL MATERIAL SPEC & NO. CRES

Notes: (a) Paint, adhesives, and protective coatings shall appear in note form. (b) Hardware shall appear in List of Material with required quantity. (c) A/R shall be used in REQD column when same material (same material specification and condition) appears more than once in different sizes in the field of the drawing. (d) A/R may be used to indicate large quantities of rivets. (e) A material specification shall only appear once in the List of Material unless material conditions vary or a Shown and Opposite part is required. Sheet and plate shall not be listed as separate items. Figure 3: Examples of List of Material

1.5.

Drawing FormatT h e d r a w in g f o r ma t f o r th e d r a w in g s iz e s lis te d o n p a g e 3 , in c lu d in g z o n in g , d r a w in g n u mb e r s , s e c u r ity c la s s if ic a tio n , e tc . , is s h o w n in F ig u r e 1 , p a g e 4 .

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2. 2.1.

NOMENCLATURE Drawing TitleG e n e r a l i n f o r ma t i o n f o r t h e s e l e c t i o n o r d e v e l o p me n t o f a d r a w i n g t i t l e i s a s follows: a. The title should be as brief as possible but should contain sufficient in f o r ma tio n to c a te g o r iz e th e p a r t p r o p e r ly a n d to d is tin g u is h it f r o m o th e r s i mi l a r p a r t s .

b. The drawing title shall consist of the following: 1 . I d e n tif yin g n o u n o r n o u n p h r a s e . 2 . T h e mo s t s ig n if ic a n t mo d if ie r o r mo d if yin g p h r a s e . 3 . T h e n e x t mo s t s ig n if ic a n t mo d if ie r o r mo d if yin g p h r a s e . T h e n o u n o r n o u n p h r a s e e s ta b lis h e s a b a s ic c o n c e p t o f a n ite m. T h e mo d i f i e r s s e r v e t o n a r r o w t h e a r e a o f c o n c e p t e s ta b lis h e d b y th e b a s ic n a me . A mo d if ie r is s e p a r a te d f r o m th e n o u n o r n o u n p h r a s e b y a c o mma a n d f r o m a n y p r e c e d i n g mo d i f i e r b y a c o mma . T h e t y p e d e s i g n a t o r a n d / o r a n y a d d itio n a l mo d if ie r s r e q u ir e d to f u r th e r id e n tif y a n ite m a r e s e p a r a te d f r o m the first part of the title by a dash. Where applicable, the word ASSEMBLY s h a ll b e u s e d a s th e la s t w o r d o f th e n o u n p h r a s e . EXAMPLES: B e a m, H o i s t i n g , G u i d e d M i s s i l e C o v e r , P r o t e c t i v e , R o c k e t M o t o rFo r w a r d S e c t i o n Ca b in e t, E le c tr ic a l E q u ip me n tCY - 1 4 7 T r a n s p o r t a t i o nDo l l y A s s e mb l y , E a r t h S a t e l l i t e c. T h e n o u n , o r n o u n p h r a s e , is n e v e r a b b r e v ia te d . A b b r e v ia tio n s a r e u s e d in th e mo d i f i e r s o n l y w h e n s p a c e i s l i mi t e d . W h e n u s e d , a b b r e v i a t i o n s s h a l l c o n f o r m to A b b r e v ia tio n s , p a r a g r a p h 2 . 2 o n p a g e 1 2 .

d . W h e n o n e d r a w in g s u p e r s e d e s a n o th e r , th e n e w d r a w in g , w h e n p r a c tic a l, h a s t h e s a me t i t l e . e . P a r e n th e s e s a r e n o t u s e d t o e n c l o s e a n y p o r t i o n o f t h e d r a w i n g t i t l e . f. P r o g r a m n a me s ( o r a b b r e v ia tio n s ) s h o u ld b e a d d e d to th e U s e d O n b lo c k a n d n o t t h e T i t l e b lo c k ; e x c e p t i o n s a r e o n t h e f i n a l o r t o p a s s e mb l y d r a w i n g .

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2.2.

AbbreviationsT h e p u r p o s e o f th is s e c tio n is to p r o v id e a lis t o f a u th o r iz e d a b b r e v ia tio n s f o r u s e o n d r a w in g s a n d a s s o c ia te d d o c u me n ts . W h e n u s e d , a b b r e v ia tio n s a n d a c r o n yms shall be in accordance with GSFC STD-256-WE-1 and MIL-STD-12 (in that order of precedence). a. Uppercase Gothic letters shall be used. b . A b b r e v ia tio n s f o r w o r d c o mb in a tio n s ( e . g . , MMCMa x imu m Ma te r ia l Co n d itio n ) s h a ll b e u s e d a s s u c h a n d s h a ll n o t b e s e p a r a te d f o r u s e s in g ly. S i n g l e a b b r e v i a t i o n s ma y b e c o mb i n e d w h e n n e c e s s a r y . c. T h e s a me a b b r e v ia tio n s h a ll b e u s e d f o r a l l t e n s e s , t h e p o s s e s s i v e c a s e a n d t h e s in g u la r a n d p lu r a l f o r ms o f a g iv e n w o r d .

d . A b b r e v i a t i o n s s h o u l d b e u s e d o n l y t o s a v e s p a c e o r t i me , b u t n e v e r a t t h e e x p e n s e o f c la r ity. e . P e r i o d s s h a l l b e u s e d w i t h a b b r e v i a t i o n s t h a t s p e l l e n t i r e w o r d s t o p r o v id e c la r ity a n d to a v o id mis in te r p r e ta tio n . T h e f o l l o w i n g a b b r e v i a t i o n s a r e a c c e p t a b le t o u s e a n d a r e i n d u s t r y - r e l a t e d a s s o c ia tio n s n o t f o u n d in G S F C S T D - 2 5 6 - W E - 1 o r MI L - S T D - 1 2 .

A F BMA

A n ti- F r ic tio n Be a r in g Ma n u f a c tu r e r s A s s o c ia tio n , I n c . 1 1 0 1 Co n n e c tic u t A v e n u e , N W S u ite 7 0 0 W a s h in g to n , D C 2 0 0 3 6

AGMA

A me r i c a n G e a r M a n u f a c t u r e r s A s s o c i a t i o n , I n c . 1 5 0 0 K in g S tr e e t S u ite 2 0 1 A r lin g to n , V A 2 2 3 1 4

ANSI

A me r i c a n N a t i o n a l S t a n d a r d I n s t i t u t e 1 4 3 0 Br o a d w a y New York, NY 10018

ASME

A me r i c a n S o c i e t y o f M e c h a n i c a l E n g i n e e r s 3 4 5 E . 4 7 th S tr e e t New York, NY 10017

ASTM

A me r i c a n S o c i e t y f o r T e s tin g a n d Ma te r ia ls 1916 Race Street P h ila d e lp h ia , P A 1 9 1 0 3

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AWS

A me r i c a n W e l d i n g S o c i e t y , I n c . 5 5 0 N . W . L e d e u n e Ro a d P . O . Bo x 3 5 1 0 4 0 Mia mi, F L 3 3 1 3 5

IEEE

I n s t i t u t e o f E l e c t r i c a l an d E l e c t r o n i c E n g i n e e r s , I n c . 445 Hose Lane P . O . Bo x 1 3 3 1 P is c a ta w a y, N J 0 8 8 5 5 - 1 3 3 1

ISO

I n te r n a tio n a l O r g a n iz a tio n f o r S ta n d a r d iz a tio n / ( O r g a n i s a t i o n I n t e r n a t i o n a l e d e N o r ma l i s a t i o n ) 1 , r u e d e V a r e mb 1211 Geneve 20 S w i t z e r l a n d /S u i s s e

NEMA

National Electrical Manufacturers Association 2 1 0 1 L S tr e e t, N W W a s h in g to n , D C 2 0 0 3 7

NSA

N a tio n a l S ta n d a r d s A s s o c ia tio n , I n c . 1 2 0 0 Q u in c e O r c h a r d Blv d G a ith e r s b u r g , MD 2 0 8 7 8

NAS

A e r o s p a c e I n d u s t r i e s A s s o c i a t i o n o f A me r i c a , I n c . 1 2 5 0 I S tr e e t, N W W a s h in g to n , D C 2 0 0 0 5

SAE

S o c i e t y o f A u t o mo t i v e E n g i n e e r s , I n c . 4 0 0 Co mmo n w e a lth D r iv e W a r r e n d a le , P A 1 5 0 9 6

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2.3.

List of Material2.3.1. Requirements on the Body of the DrawingE a c h p a r t l i s t e d i n t h e L i s t o f M a t e r i a l ( P a r t s L i s t ) mu s t b e id e n tif ie d a t le a s t o n c e b y a n I te m ( F in d ) N u mb e r o n th e b o d y o f th e d r a w in g ( e x c e p t s in g le ite m d r a w in g s a n d s h o w n a n d o p p o s ite ite m d r a w in g s ) . Note: P a r t s s h a l l b e b r a c k e t e d , i n d i c at i n g r e f e r e n c e , w h e n t h e y a r e id e n tif ie d b y n u mb e r a n d a r e n o t n o te d in th e L is t o f Ma te r ia l. S u c h p a r ts a r e s h o w n in p h a n to m. Re p e a te d ite m n u mb e r s s h a ll b e indicated as reference either within brackets or by the word REF.

2.3.2.

Requirements in the List of Materiala . T h e L i s t o f M a t e r i a l i s a l i s t o f a l l p a r t s a n d ma t e r i a l s c a l l e d o u t o n th e d r a w in g . S e e F ig u r e 3 o n p a g e 1 0 . b . T h e q u a n t i t y o f p a r t s n o te d i n t h e L i s t o f M a t e r i a l i s t h e n u mb e r r e q u ir e d t o c o mp l e t e t h e n o te d a s s e mb l y . c. W h e n a n e w d r a w in g is ma d e , a ll p a r ts in th e L is t o f Ma te r ia l s h o u ld b e g r o u p e d a s to typ e , s u c h a s d a s h n u mb e r ( f o r s h o w n a n d o p p o s ite a s s e mb lie s ) , G S F C d r a w in g s ( f o r d e ta ile d p a r ts ) , MS p a r ts , N A S p a r ts , e tc . , a n d lis te d in th is s e q u e n c e .

d . Q u a n t i t i e s o f B u l k I t e ms a n d p l a c e me n t : r e f e r t o n o t e s ( a ) th r o u g h ( e ) o n F ig u r e 3 o n p a g e 1 0 . e. P r e f e r r e d p a r ts lis ts f o r p a r ts , ma te r ia ls , a n d p r o c e s s e s c a n b e f o u n d in a n u n o f f ic ia l p u b lic a tio n a v a ila b le f o r v ie w in g in th e Mechanical Engineering Branch. The Design Selection Guide c o n ta in s a w id e r a n g e o f h a r d w a r e , ma te r ia ls , d e s ig n s ta n d a r d s , a n d p r o c e s s e s . I t s h a l l b e n o te d t h a t n o t a l l o f t h e i t e ms i n t h i s reference guide are rated for space flight use. Note: A ll f a s te n e r s u s e d in f lig h t h a r d w a r e a n d c r itic a l n u ts a n d b o lts u s e d o n g r o u n d s u p p o r t e q u ip me n t, in c lu d in g a ll f lig h t/G S E i n t e r f a c e s , mu s t me e t t h e s p e c i f i c a t i o n G S F C F a s t e n e r I n t e g r i t y R e q u ir e m e n ts, G S F C S - 3 1 3 - 1 0 0 , Ma te r ia ls Br a n c h , O f f ic e o f F lig h t A s s u r a n c e .

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2.4.

Notes on DrawingsI n f o r ma tio n o th e r th a n p ic to r ia l v ie w s a n d d ime n s io n s n e c e s s a r y f o r c o mp le tin g a d r a w i n g i s c l a s s i f i e d a s n o t e s . T h e tw o typ e s o f n o te f o r ms a r e G e n e r a l N o te s a n d L o c a l C h a r a c t e r N o t e s . N o t es o n a d r a w i n g t a k e p r e c e d e n c e o v e r s p e c if ic a tio n r e q u ir e me n ts ; h e n c e , n o te s c o n f lic tin g w ith r e f e r e n c e d specifications shall not be placed on a drawing unless they are necessary for d e v ia tio n s f r o m c e r ta in p r o v is io n s o f th e s p e c if ic a tio n .

2.4.1.

Security ClassificationThe security classification Top Secret, Secret, or Co n f id e n tia l s h a ll b e lo c a te d o n th e d r a w in g a s n o te d in F ig u r e 1 on page 4. E a c h s h e e t o f a mu l t i s h e e t d r a w i n g s h a l l b e i n d iv id u a l l y c l a s s i f i e d a s t o i t s c o n t e n t s . T h e s e c u r i t y s t a mp o n e a c h s h e e t s h a l l b e t h a t o f th e h ig h e s t c la s s if ic a tio n f o r a n y ite m s h o w n o n th a t in d iv id u a l s h e e t, n o t th e g e n e r a l o v e r a ll c la s s if ic a tio n o f th e e n tir e s e t o f d r a w in g s o r th e e n d ite m. O n r o ll- s iz e d r a w in g s , th e s e c u r ity c la s s if ic a tio n s h a ll b e s h o w n o n th e r e v e r s e s id e a t b o th e n d s o f th e d r a w in g s n e x t to th e d r a w in g n u mb e r to e n a b le th e c la s s if ic a tio n to be seen without unrolling the drawing. A w a r n i n g n o t e s h a l l b e i n c l u d ed a d j a c e n t t o t h e s e c u r i t y classification located above the Title block and shall read as follows: THIS MATERIAL CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE LAWS, TITLE 18 U.S.C., SECTIONS 793 AND 794. THE TRANSMISSION OR REVELATION OF WHICH IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROHIBITED BY LAW.

2.4.2.

Note LocationN o t e s o f g e n e r a l c h a r a c t e r t h a t d o n o t r e q u ir e le a d e r s to in d ic a te w h e r e th e y a p p ly, a n d f o r w h ic h p r o v is io n h a s n o t b e e n ma d e in th e s u p p le me n ta r y b lo c k s o f th e d r a w in g f o r ma t, s h a ll b e lo c a te d in th e f o llo w in g o r d e r o f p r e f e r e n c e : a. Adjacent to the upper left border and to the left of all views.

b . I mme d ia te ly to th e le f t o f th e r e v is io n b lo c k . c. A d j a c e n t t o t h e l o w e r l e f t b o rd e r o r b e l o w t h e r e v i s i o n b l o c k , space being left for extending the revision block downward. This location should be avoided whenever practical because the space required for revisions cannot be anticipated.

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2.4.3.

Numbering of NotesG e n e r a l n o te s a r e n u mb e r e d c o n s e c u tiv e ly d o w n w a r d . N o te n u mb e r s ma y b e id e n tif ie d o n th e f ie ld o f th e d r a w in g b y p la c in g th e n o te n u mb e r in a p e n n a n t- s h a p e d f la g a t th e g e n e r a l n o te lo c a tio n a n d in th e f ie ld o f th e d r a w in g , o r in th e L is t o f Ma te r ia l ( M a t e r i a l S p e c i f i c a t i o n c o l u mn ) , w h i c h e v e r l o c a t i o n i s mo r e a p p r o p r ia te .

2.4.4.

Note ExamplesT h e f o l l o w i n g n o t e s a r e l i s t e d a s r e p r e s e n t a t i v e e x a mp l e s a n d s h o u ld b e u s e d o n E n g in e e r in g D r a w in g s w h e n a p p lic a b le . S i g n if i c a n t i n f o r ma t i o n i s t o b e i n s e r t e d w h e r e b l a n k ( s ) a r e in d ic a te d a n d , f o r mo s t c a s e s , th e n o ta tio n s in p a r e n th e s e s a r e f o r in f o r ma tio n o n ly. ( W h e n n o t a p p lic a b le , d o n o t u s e in n o te ) . B e f o r e u s i n g t h e r e f e r e n c e d s p e c i f ic a t i o n s , c h e c k t h e D e p a r t me n t o f Defense Index of Specifications and Standards Publications to ensure that the specification has not been cancelled or superseded. U s e e i t h e r o f t h e f o l l o w i n g s t a t e me n t s a s ma i n h e a d i n g f o r n o t e s : Except as noted or Unless otherwise specified.

2.4.4.1.

Dimension NotesALL DIMENSIONS APPLY AFTER SURFACE TREATMENT. DIMENSIONAL LIMITS AND SURFACE ROUGHNESS DESIGNATIONS APPLY (state BEFORE or AFTER) PLATING. (For other coatings, substitute the appropriate expression for plating.) DIMENSIONS TO APPLY AFTER STRESS RELIEF. DIMENSIONING AND TOLERANCING TO BE INTERPRETED IN ACCORDANCE WITH ANSI Y14.5M-1982. (Note need be added only when drawings are not in compliance with GSFC X-673-64-1F.) GEAR TOLERANCES TO BE IN ACCORDANCE WITH AGMA STANDARD QUALITY (insert number). DIMENSIONS ARE IN MILLIMETERS.

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TOOLING-CONTROLLED DIMENSION PER TEMPLATE (or TOOL) NUMBER GX XXXXXXX. THE ACTUAL TOLERANCES ON THE FEATURE'S LOCATIONS ARE CONTROLLED BY THE TEMPLATE. (Note to be flagged to toolingaffected dimensions and tolerances, which are then enclosed in parentheses to indicate a reference; template drawings shall carry a note stating the drawing number of the part they are used to fabricate.) TORQUE LIMITS FOR THREADED FASTENERS SHALL BE IN ACCORDANCE WITH PROJECT APPROVED SPECIFICATION NUMBER (OR ENGINEERING ANALYSIS).

2.4.4.2.

Heat Treating NotesNote for beryllium copper: HEAT TREAT IN ACCORDANCE WITH MIL-H-7199 TO ( Br i n e l l ) . Note for steel: HEAT TREAT IN ACCORDANCE WITH MIL-H-6875 TO XXX. (XXX = Rockwell, Brinell, or Vickers).

N o te s f o r a lu min u m: HEAT TREAT IN ACCORDANCE WITH MIL-H-6088 TO ( Br i n e l l ) . CONDITION AFTER H EAT T R EAT T O (insert BRAZING or WELDING) IN ACCORDANCE WITH MIL-H-6088. AFTER WELDING, SOLUTION HEAT TREAT AND ARTIFICIALLY AGE TO T-6 CONDITION PER MIL-H-6088.

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2.4.4.3.

Joining Method Notes (welding, brazing, etc.)T h e f o llo w in g s p e c if ic a tio n s u p e r s e d e s MI L - W - 8 6 0 4 f o r A lu m. ; MI L - W - 8 6 1 1 A f o r S te e l, CRE S , a n d H T RE S A L Y ; a n d MI L - W - 1 8 3 2 6 f o r Ma g n e s iu m: FUSION WELD IN ACCORDANCE WITH CLASS MIL-STD-2219, PROCESS U SIN G F IL L ER M ET AL AND APPROPRIATE FLUX. (Joint dimension and design should be specified on the drawing.) ELECTRON BEAM WELDING IN ACCORDANCE WITH MIL-W-46132. SOLDER IN ACCORDANCE WITH NHB 5300.4(3A1), USING SOLDER MATERIAL, QQ-S-571, TYPE . SOLDER IN ACCORDANCE WITH DOD-STD-1866 (GENERAL SOLDERING PROCESS FOR ALL TYPES AND MATERIALS FOR NONELECTRICAL APPLICATIONS). N o te f o r a lu min u m: DIP BRAZE IN ACCORDANCE WITH MIL-STD-645; CONDITION PER H EAT T R EAT T O MIL-H-6088. SILVER SOLDER IN ACCORDANCE WITH MIL-B-7883, TYPE G R AD E USING SOLDER MATERIAL QQ-B-654, CLASS . RIVET IN ACCORDANCE WITH MIL-STD-403.

2.4.4.4.

Plating and Coating NotesP l a t i n g n o t e s a r e g e n er a l l y n o t f o r s p a c e f l i g h t h a r d w a r e u s e i n r e s t r i c t e d a r e a s s u c h a s o p t i c s , e l e c t r o n i c s , e t c . , d u e to f la k in g . CADMIUM PLATE IN ACCORDANCE WITH QQ-P-416, CLASS . TYPE H A R D C H R O M E P L A T E ( s i z e ) ( s i z e ) T H I C K P E R , CLASS ; DIMENSIONS QQ-C-320, TYPE SHOWN APPLY AFTER PLATING. NICKEL PLATE IN ACCORDANCE WITH MIL-STD-171, . F I N I S H ( p a r a . n u m b e r ) , TYPE

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SILVER PLATE IN ACCORDANCE WITH QQ-S-365, , G R AD E . TYPE PAINT IN ACCORDANCE WITH MIL-STD-171, TABLE ; F IN ISH N O . COLOR IN ACCORDANCE WITH FED-STD-595 (color number). N o te s f o r a lu min u m: ANODIZE IN ACCORDANCE WITH MIL-A-8625, TYPE , CLASS COLOR (name of color only). IRIDITE IN ACCORDANCE WITH MIL-C-5541, . CLASS Note for CRES: PASSIVATE PER QQ-P-35, TYPE .

OF MIL-STD-171. F IN ISH Use paragraph that applies to material being used. Note for iron and steel: APPLY PROTECTIVE PHOSPHATE COATING IN ACCORDANCE WITH MIL-C-12968, TYPE . if applicable.) (Add CLASS

N o t e f o r t i t a n iu m: SURFACE FINISH TO BE IN ACCORDANCE WITH AMS 2488, TYPE .

2.4.4.5.

Surface Preparation NotesSURFACE TO BE CLEANED AND POLISHED FOR VACUUM USE. DO NOT USE ROUGE COMPOUNDS OR CHEMICALS DURING BUFFING OR POLISHING ON ITEMS REQUIRING TANK-TYPE LEAK TESTS. EXTERNAL SURFACE TO BE BUFFED TO . BEFORE ELECTROPOLISHING, MASK ALL SURFACES MARKED .

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VAPOR DEGREASING PER ASTM D4126, GENERAL SOLVENT GRADE 1,1,1 TRICHLOROETHANE.

2.4.4.6.

Testing and Inspection NotesTHIS PART SHALL HAVE A LEAK RATE OF NOT MORE THAN (1 x 10-7 CC/SEC OF HELIUM) WHEN MEASURED BY A CALIBRATED MASS SPECTROMETER HAVING A SENSITIVITY OF (1 x 10-9 CC/SEC WITH GREATER THAN 90% HELIUM) AT A DIFFERENTIAL OF (ONE) ATMOSPHERE OR EQUIVALENT TEST. RADIOGRAPHIC INSPECTION OF ALL WELDS IN ACCORDANCE WITH MIL-STD-00453. ULTRASONIC INSPECTION PER MIL-STD-2154, TYPE (Insert I or II), CLASS . (I = Immersion Method, II = Contact Method.)

F o r G e n e r a l F r a c tu r e Co n tr o l P la n fo r P a y lo a d s U s in g th e S p a c e T r a n s p o r ta tio n S y s te m ( S T S ) , r e f e r to G S F C 7 3 1 - 0 0 0 5 - 8 3 . O n e o f th e f o llo w in g n o te s s h o u ld b e u s e d f o r p a r ts r e q u ir in g e tc h in g a n d /o r liq u id p e n e tr a n t in s p e c tio n : FRACTURE CRITICAL PART - ETCH AND PENETRANT INSPECT PER GSFC S-313-009, CODE XXXXX. (Usually used for machined parts.) FRACTURE CRITICAL PART - DO NOT ETCH PART. PENETRANT INSPECT PER GSFC S-313-009, CODE XXXXX. (Usually used for rolled parts.) I f a r e a s o f a p a r t a r e t o b e e t c he d a n d i n s p e c t e d p r i o r t o f i n i s h ma c h in in g , a s e p a r a te d r a w in g n o te s h o u ld c a ll o u t th is r e q u ir e me n t t o a v o i d c o s t l y mis t a k e s .

2.4.4.7.

Threaded Inserts Cleaning and Installation NotesN o t e f o r a l u mi n u m a n d ma g n e t i c s u r f a c e s : CLEAN THREADED INSERTS WITH TRICHLOROETHANE AND BAKE OUT AT 100 DEGREES CELSIUS FOR 3 TO 4 HOURS PRIOR TO INSTALLATION. APPLY DRY FILM LUBRICANT GOVT. DESIGNATION M-6003, TYPE (insert I or II) PER MIL-L-46010 QPL (LIST). (Type I cure temp. = 150 degrees C.) (Type II cure temp. = 240 degrees C.)

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INSTALL THREADED INSERTS PER XXX. (XXX = MS33537 for coil type, MS51835 for Keen type, or M I L -I -4 5 9 3 2 / 1 f o r t h i n w a l l t y p e . ) INSTALL CLINCH NUTS PER MIL-N-45938/1. AFTER THE BONDING EPOXY IS CURED PER NOTE , AL L IT EM (insert number) THREADED INSERTS SHALL BE CAPABLE OF WITHSTANDING A CORRESPONDING TORQUE LOAD, AS LISTED IN TORQUE TABLE, WITHOUT BECOMING LOOSE. ALL THREADS ON THREADED FASTENERS SHALL BE FREE OF ADHESIVE AND FOREIGN MATERIAL. TORQUE TABLE THREAD SIZE TORQUE, IN-LBS 6-32 UNC x.x ... ... ... ...

TAP ALL HOLES PRIOR TO COATING; INSTALL THREADED INSERT AFTER COATING.

2.4.4.8.

Miscellaneous NotesPLACE IN BAG AFTER FINAL ELECTROPOLISHING. BAG SHALL CONFORM TO MIL-P-116, METHOD (see spec.). ALTERED PART SOURCE INFORMATION: PAR T N O .: VEN D O R : ADDRESS: MAINTAIN AS MATCHED SET AFTER MACHINING. Note for NON-flight parts ONLY: STEEL STAMP, ETCH, OR ENGRAVE (size) HIGH +.005 CHARACTER AS SHOWN, X .010 -.000 DEEP. THIS DRAWING TO BE INTERPRETED IN ACCORDANCE WITH GSFC X-673-64-1F. RUBBER STAMP (size) HIGH CHARACTER AS (insert INK or PAINT) IN SH O W N , U SIN G ACCORDANCE WITH (specification *). (* Include manufacturer's part number and address.)

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BAG PART PER MIL-P-116, METHOD TAG WITH PART NUMBER. ALTERED SURFACES TO HAVE .

, AND

(Refer to paragraph 10.4.1, page 93, for symbol notation.) FINISH ALL OVER. (Refer to paragraph 10.4.1, page 93, for symbol notation.)

SURFACE ROUGHNESS AS XXX: MACHINED SURFACES . (where XXX is ROLLED, EXTRUDED, or DRAWN). (Refer to paragraph 10.4.1, page 93, for symbol notation.) IN SID E C O R N ER S R MAXIMUM.

UNIT TO BE STRAIGHTENED AND STRESSRELIEVED AFTER WELDING. WELDED OR BRAZED FILLETS TO BE CONFINED TO INSIDE SURFACE. TWINE SHALL CONFORM TO THE REQUIREMENTS , CLASS . OF MIL-T-713, TYPE A MANUFACTURER'S CERTIFICATION OF MATERIAL SPECIFICATION COMPLIANCE MUST BE SUPPLIED W IT H PAR T (insert number). MAGNETIC SPECIFICATION--PERMEABILITY OF (specify units) . LESS THAN COMPONENTS MUST BE PACKAGED AND MARKED IN ACCORDANCE WITH APPLICABLE INTERSTATE COMMERCE COMMISSION (ICC) REGULATION 49-CFR71-78; SHIPMENT SHALL BE MADE DIRECTLY TO THE USING AGENCY. EXPLOSIVE (or other applicable wording) COMPONENTS ARE HAZARDOUS AND MUST BE HANDLED IN ACCORDANCE WITH APPLICABLE SAFETY REGULATION 49-CFR71-78.

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2.4.4.9.

Informational NotesI n f o r ma tio n a l n o te s , s u c h a s th e f o llo w in g g o v e r n me n t r ig h ts to ma n u f a c t u r e n o t e , s h a l l a p p e a r a d j a c e n t t o t h e r i g h t b o r d e r a n d T i t l e b lo c k o f t h e d r a w i n g : THE XXXX COMPANY, CHICAGO, IL., PART NUMBER XXXX CORRESPONDS TO THE ITEM DEPICTED ON THIS DRAWING, WHICH IS FURNISHED FOR UNRESTRICTED USE IN CONNECTION WITH ANY U.S. GOVERNMENT MANUFACTURE OR PROCUREMENT. SUCH USE IS AUTHORIZED BY THE XXX COMPANY LETTER NO. AND DATED XXX SIGNED . NO OTHER USE IS AUTHORIZED.

2.4.5.

Local Character NotesN o t e s o f l o c a l c h a r a c t e r , s u c h a s d r i l l n o te s , t h r e a d n o te s , e t c . , t h a t r e q u i r e l e a d e r s t o i n d i c a t e t h e f e a tu r e s t o w h i c h t h e y a p p ly , s h a l l b e l o c a t e d i n t h e f i e l d o f t h e d ra w i n g i n p o s i t i o n s a d j a c e n t t o s u c h f e a t u r e s . E a c h n o t e s h a l l s t a t e t h e n u mb e r o f f e a tu r e s to w h ic h it applies unless a leader is drawn to each feature.

2.4.6.

General Dimensional Tolerance NotesT h e g e n e r a l to le r a n c e s e n te r e d in th e s u p p le me n ta r y p o r tio n o f th e T i t l e b lo c k s h a l l c o n tr o l a l l d ime n s i o n s a p p l i e d t o t h e d r a w i n g , e x c e p t t h o s e s p e c i f i c a l l y l a b e l e d M a x , M i n , R e f , D a t u m, o r Ba s ic , o r d ime n s io n s h a v in g to le r a n c e s a p p lie d d ir e c tly th e r e to , o r d ime n s io n s c o n tr o lle d b y n o te s o r d o c u me n ts in v o k e d o n th e d r a w in g . G e n e r a l to le r a n c e s ma y b e c h a n g e d to th e p r e v a le n t to le r a n c e s th a t a r e r e q u ir e d b y th e d r a w in g typ e . T h is is d o n e b y s tr ik in g th r o u g h th e to le r a n c e a n d in s e r tin g th e n e w to le r a n c e b e n e a th th e o ld . I n th e c a s e w h e r e me tr ic to le r a n c in g is r e q u ir e d , s e e S e c tio n 1 0 . 2 , s u b p a r a g r a p h i, f o r g e n e r a l to le r a n c e s .

2.5.

Specification CalloutsN o r ma lly, o n ly th e b a s ic d o c u me n t n u mb e r o f a s p e c if ic a tio n s h o u ld b e s h o w n o n t h e d r a w i n g , i n w h i c h c a s e , t h e l a t e s t i s s u e i n e f f e c t a t t h e t i me o f i n v i t a t i o n t o b id s h a ll b e imp o s e d in a ll p r o c u r e me n t a c tio n s . Ch a n g e s to th e s p e c if ic a tio n o c c u r r in g s u b s e q u e n t to th e time o f in v ita tio n to b id s h a ll n o t b e imp o s e d in c u r r e n t p r o c u r e me n t a c tio n s u n le s s th e d r a w in g is r e v is e d to s h o w th e n e w is s u e b y b a s ic d o c u me n t n u mb e r , r e v is io n s , a me n d me n t, a n d /o r d a te a n d c u r r e n t p r o c u r e me n t a c tio n s a me n d e d to s p e c if y th e n e w d r a w in g r e v is io n o r E n g in e e r in g Order (EO).

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I f th e b a s ic d o c u me n t n u mb e r , r e v is io n , a me n d me n t, a n d /o r d a te o f a s p e c if ic a tio n a r e s h o w n o n a d r a w in g , o n ly th a t p a r tic u la r is s u e s h a ll b e imp o s e d in a ll p r o c u r e me n t a c tio n s . Ch a n g e s to th e s p e c if ic a tio n o c c u r r in g s u b s e q u e n t to th e time o f in v ita tio n to b id s h a ll n o t b e imp o s e d in e ith e r c u r r e n t o r f u tu r e p r o c u r e me n t a c tio n s u n le s s th e d r a w in g is r e v is e d to s h o w th e n e w is s u e b y b a s ic d o c u me n t n u mb e r , r e v is io n , a me n d me n t, a n d /o r d a te a n d c u r r e n t p r o c u r e me n t a c tio n s a me n d e d to s p e c if y th e n e w d r a w in g r e v is io n o r E O . Re g a r d le s s o f w h e th e r a s p e c if ic a tio n is s h o w n o n th e d r a w in g b y b a s ic d o c u me n t n u mb e r o n ly o r b y a p a r tic u la r is s u e , s u p e r s e d in g s p e c if ic a tio n s ( n e w n u mb e r ) s h a ll n o t b e imp o s e d in e ith e r c u r r e n t o r f u tu r e p r o c u r e me n t a c tio n s u n le s s th e d r a w in g is r e v is e d to s h o w th e n e w b a s ic d o c u me n t n u mb e r a n d , if a p p lic a b le , is s u e a n d c u r r e n t p r o c u r e me n t a c tio n s a me n d e d to s p e c if y th e n e w d r a w in g r e v is io n o r E O .

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3. 3.1.

DRAFTING PRACTICES GeneralT h e s e d r a f t i n g p r a c t i c e s a r e t o b e e mp l o ye d in th e p r e p a r a tio n o f d r a w in g s b y G S F C p e r s o n n e l t o a c h i e v e c o mmo n a l i t y t h r o u g h o u t a n d r e s u l t i n l e g i b l e r e p r o d u c tio n s a t th e le a s t c o s t f r o m o r ig in a l d r a w in g s . D r a w in g s mu s t b e c o mp le te a n d u n a mb ig u o u s in in te r p r e ta tio n . Co mp le te d r a w in g s c o n ta in o r ma k e r e f e r e n c e to a ll d a ta n e c e s s a r y f o r f a b r ic a tin g a n d in s ta llin g th e p a r t a n d , w h e n a p p lic a b le , th e n e c e s s a r y te s t r e q u ir e me n ts , p r o c u r e me n t r e q u ir e me n ts , a n d s o u r c e . T h ir d - a n g le o r th o g r a p h ic p r o j e c tio n s h a ll b e u s e d f o r me c h a n ic a l e n g in e e r in g d r a w in g s . ( Ce r ta in d ia g r a ms , s c h e ma tic s , e tc . , a r e e x c e p te d . ) A lth o u g h o th e r typ e s o f p r o j e c tio n , s u c h a s is o me tr ic , p e r s p e c tiv e , e tc . , a r e n o t p r o h ib ite d , th e ir u s e mu s t b e c o n f i n e d t o a n a u x i l i a r y v ie w o n a d r a w i n g o f a c o mp l e x p a r t w h e n such a view shall aid in visualizing the part. D r a w in g s n e e d n o t h a v e th r e e v ie w s , ( i. e . , o n e o r tw o v ie w s a r e p e r mis s ib le f o r o b j e c ts th a t c a n b e c o mp le te ly d e f in e d ) . Co mp le me n ta r y n o te s o r d ime n s io n s a r e acceptable in place of the additional views. The rule shall be that only those v ie w s s h a ll b e d r a w n th a t a r e n e c e s s a r y to c o n v e y th e r e q u ir e d c h a r a c te r is tic s o f t h e p a r t . V i e w s , d ime n s i o n s , e t c . , s h a l l n o t e x t e n d i n t o t h e ma r g i n s o f t h e d r a w in g .

3.2.

LinesA c c e p t a b l e q u a l i t y o f r e p r o d u c t i o n s i s d e p en d e n t o n t h e d e n s i t y a n d u n i f o r mi t y o f lin e w o r k ( a n d le tte r in g ) . T yp e s o f lin e s d e s c r ib e d h e r e in a r e me r e ly lin e c o n v e n t i o n s , b u t i n e v e r y c a s e , e a c h t y p e o f l i ne s h a l l b e o p a q u e a n d o f u n i f o r m w i d t h a n d s h a ll b e u s e d o n a ll d r a w in g s o th e r tha n d i a g r a ms , s u c h a s s c h e ma t i c s , e t c .

3.2.1.

Ink Lines and Plotted LinesL in e s , w h e th e r h a n d - d r a w n o r p lo tte d , s h a ll b e o p a q u e a n d o f uniform width for each type of line. Two widths of lines, i.e., thin a n d th ic k , w ith th e ir w id th s in th e p r o p o r tio n s o f 1 :2 , s h a ll b e u s e d . The actual width of each type of line shall be governed by the size a n d s t y l e o f t h e d r a w i n g ; t h e r e l a t i v e w i d th s o f t h e l i n e s s h a l l a p p r o x ima te th o s e s h o w n in F ig u r e 4 o n p a g e 2 6 .

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Figure 4: Line Types and Conventions

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3.2.2.

Pencil LinesP e n c il lin e s s h a ll b e o p a q u e a n d o f u n if o r m w id th th r o u g h o u t th e ir le n g th . T h e lin e w id th s w h ic h a r e s p e c if ie d f o r in k lin e s d o n o t a p p ly to p e n c i l l i n e s . C u t t i n g a n d v ie w i n g p la n e l i n e s a r e t h e t h i c k e s t l i n e s on the drawing. However, the thick lines used for outlines and o th e r v is i b le l i n e s s h a l l b e s u f f i c i e n t l y p r o mi n e n t t o i mme d ia t e l y d if f e r e n tia te th e m f r o m lin e s u s e d f o r o th e r p u r p o s e s . H id d e n , s e c tio n in g , c e n te r , p h a n to m, e x te n s io n , d ime n s io n , a n d le a d e r lin e s s h a l l b e t h i n n e r t h a n o u t l i n e s . I n s e l e c t i n g t h e w i d th s o f p e n c i l lin e s , c o n s id e r a tio n s h a ll b e g iv e n to th e me d iu m o f r e p r o d u c tio n in v o lv e d to e n s u r e p r o p e r r e p r o d u ctio n a n d r e d u c tio n o f th e th in n e r lines.

3.2.3. 3.2.3.1.

Types of Lines Center LinesCe n te r lin e s s h a ll b e c o mp o s e d o f lo n g a n d s h o r t d a s h e s , a lte r n a te ly and evenly spaced, with a long dash at each end. Center lines shall c r o s s w ith o u t v o id s . S e e F ig u r e 5 , b e lo w , a n d F ig u r e 6 , p a g e 2 8 .

Figure 5: Line Conventions

V e r y s h o r t c e n te r lin e s ma y b e u n b r o k e n if th e r e is n o c o n f u s io n w i t h o th e r l i n e s . C e n te r l i n e s s ha l l a l s o b e u s e d t o i n d i c a t e t h e tr a v e l o f a c e n te r . S e e F ig u r e 6 o n p a g e 2 8 .

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Figure 6: Alternate Position

3.2.3.2.

Dimension LinesD i me n s i o n l i n e s s h a l l t e r mi n a t e i n a r r o w h e a d s a t e a c h e n d . T h e y s h a l l b e u n b r o k e n e x c e p t w h e r e s p a c e i s r e q u i r e d f o r t h e d i me n s i o n . T h e p r o p e r me th o d o f s h o w in g d ime n s io n s a n d to le r a n c e s is e x p la in e d in S e c tio n 1 . 7 o f A N S I Y 1 4 . 5 M- 1 9 8 2 .

3.2.3.3.

LeadersL e a d e r s s h a ll b e u s e d to in d ic a te a p a r t o r p o r tio n to w h ic h a n u mb e r , n o te , o r o th e r r e f e r e n c e a p p lie s a n d s h a ll b e a n u n b r o k e n l i n e t e r mi n a t i n g i n a n a r r o w h e a d , d o t, o r w a v y l i n e . A r r o w h e a d s s h o u l d a l w a y s t e r mi n a t e a t a l i n e ; d o t s s h o u l d b e w i t h i n t h e o u t l i n e o f a n o b j e c t.

3.2.3.4.

Break LinesS h o r t b r e a k s s h a ll b e in d ic a te d b y s o lid f r e e h a n d lin e s . F o r lo n g b r e a k s , f u l l r u l e d l i n e s w i t h f r e e h an d z i g z a g s s h a l l b e u s e d . S h a f t s , r o d s , tu b e s , e tc . , w h ic h h a v e a p o r tio n o f th e ir le n g th b r o k e n o u t, s h a ll h a v e th e e n d s o f th e b r e a k d r a w n a s in d ic a te d in F ig u r e 7 o n page 29.

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Figure 7: Break Lines

3.2.3.5.

Phantom LinesPhantom lines shall be used to indicate the alternate position of parts of the item delineated, repeated detail, or the relative position o f a n a b s e n t p a r t a n d s h a ll b e c omp o s e d o f a lte r n a tin g o n e lo n g a n d two short dashes, evenly spaced, with a long dash at each end. See F ig u r e 5 o n p a g e 2 7 , F ig u r e 6 o n p a g e 2 8 , a n d F ig u r e 8 , b e lo w .

Figure 8: Repeated Detail

3.2.3.6.

Sectioning LinesSectioning lines shall be used to indicate the exposed surfaces of a n o b j e c t i n a s e c t i o n a l v ie w . T h e y a r e g e n e r a l l y t h i n f u l l l i n e s , b u t ma y v a r y w ith th e k in d o f ma te r ia l s h o w n in s e c tio n .

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3.2.3.7.

Extension LinesE x t e n s i o n l i n e s a r e u s e d t o i n d i c a te t h e e x t e n s i o n o f a s u r f a c e o r t o p o in t t o a l o c a t i o n o u ts i d e t h e p a r t o u t l i n e . T h e y s t a r t w i t h a s h o r t , v is i b le g a p f r o m t h e o u t l i n e o f t h e p a r t a n d a r e u s u a l l y p e r p e n d ic u l a r t o t h e i r as s o c i a t e d d i me n s i o n l i n e s .

3.2.3.8.

Hidden LinesHidden lines shall consist of short dashes, evenly spaced. These lin e s a r e u s e d to s h o w th e h id d e n f e a t u r e s o f a p a r t . T h e y s h a l l a l w a y s b e g in w i t h a d a s h i n c o n ta c t w i t h t h e l i n e f r o m w h i c h t h e y b e g in , e x c e p t w h e n s u c h a d a s h w o u ld f o r m a c o n tin u a tio n o f a f u ll l i n e . D a s h e s s h a l l t o u c h a t c o r ne r s , a n d a r c s s h a ll b e g in w ith d a s h e s o n th e ta n g e n t p o in ts . S e e F ig u r e 5 o n p a g e 2 7 a n d F ig u r e 8 on page 29.

3.2.3.9.

Stitch LinesS t i t c h l i n e s s h a l l b e u s e d t o i n d ic a t e t h e s t i t c h in g o r s e w i n g l i n e s o n a n a r tic le a n d s h a ll c o n s is t o f a s e r ie s o f v e r y s h o r t d a s h e s , a p p r o x ima te ly h a lf th e le n g th o f d a s h o r h id d e n lin e s , e v e n ly s p a c e d . L o n g l i n e s o f s t i t c h i n g ma y b e i n d i c a t e d b y a s e r i e s o f stitch lines connected by phantom lines.

3.2.3.10.

Outlines or Visible LinesT h e o u t l i n e o r v is i b le l i n e s h a l l b e u s e d f o r a l l l i n e s o n t h e d r a w i n g r e p r e s e n tin g v is ib le lin e s o n th e o b j e c t; s e e F ig u r e 5 o n p a g e 2 7 .

3.2.3.11.

Datum LinesD a tu m lin e s s h a ll b e u s e d to in d ic a te th e p o s itio n o f a d a tu m p la n e a n d s h a ll c o n s is t o f o n e lo n g d a s h a n d tw o s h o r t d a s h e s , e v e n ly spaced.

3.2.3.12.

Cutting-Plane/Viewing-Plane LinesThe cutting-plane lines shall be used to indicate a plane or planes in w h ic h a s e c tio n is ta k e n . T h e v ie w in g - p la n e lin e s s h a ll b e u s e d to indicate the plane or planes from which a surface or surfaces are v i e w e d . O n s i mp l e v i e w s , t h e c u t t i n g p l a n e s s h a l l b e i n d i c a t e d a s s h o w n in F ig u r e 9 o n p a g e 3 1 . V ie w s h a ll b e s h o w n in b a c k o f th e cutting plane (3rd angle).

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Figure 9: Full Sectional View

Engineering Drawing

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