Post on 26-Mar-2018
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Unbrako®
P
F Cetrochemical
asteners atalog
All information contained in this catalogue has been prepared to assist users in their requirements for Studbolts. The
information is based on International Fastener Standards. All such source material and information beyond the control
of Deepak fastener Ltd (DFL) is subject to change.
Whilst every care has been taken to ensure that all information and technical data is accurate, DFL will not be liable to
any customer that relies on any matter, fact or representation nor will it be liable for any subsequent damage or loss
resulting from the use of any information contained in this catalogue. Customers are advised to make their own enquiries
or seek independent advice regarding the fitness and suitability of the products listed.
The products listed in this catalogue might not be stocked at DFL at all times and customers are advised to enquire the
availability of the same. E. & O.E.
.
.
.
Deepak Fasteners through its Unbrako Division warrants that these products conform to industry standards
specified herein and will be free from defects in materials and workmanship. This warranty is expressly given in lieu of any
and all other express or implied warranties, including any implied warranty of merchantability or fitness for a particular
purpose, and in lieu of any other obligation on our part of DFL will at its option, repair or replace free of charge (excluding
all shipping and handling costs) any products which have not been subject to misuse, abuse, or modification and which in its
sole determination were not manufactured in compliance with the warranty given above.
The remedy provided herein shall be the exclusive remedy for any breach of warranty or any claim arising in any
way out of the manufacture, sale or use of these products. In no event shall Deepak Fasteners be liable for consequential,
incidental or any other damages of any nature whatsoever except those specifically provided herein for any breach of warranty
or any claim arising in any way of the manufacture, sale or use of these products. No other person is authorised by Deepak
Fasteners to give any other warranty, written or oral, pertaining to the products.
.
Disclaimer
Limited Warranty And Exclusive Remedy
Contents Pages
Quality And Reliability
Unbrako Studbolts Product Range
Studbolt Material Specification
Nut Material Specification
Influence Of Chemicals In Steel
Properties Of Steel
Dimensions Of Nuts
ASTM F436 Washer
Assembly & Tightening
Specialized Coating
Tightening Torques
Proof Load
Studbolt Sizes For Flanges
Product Weight
Certifications
About Unbrako
ASTM A-193/ASME SA-193
ASTM A-320 & ASTM A-307
ASTM A-194/ASME SA-194
Metric
Imperial
Metric
Imperial
Metric
Imperial
1
2
3
4-5
6
7
8
9
10-11
12
13
14
15
16-17
18
19-21
22
23
24-29
30-33
Unbrako®
Our Commitment To Quality
1
Founded in 1911, Unbrako has been a leader in advancing the
technology of bolted joints and meeting the needs of industry
for stronger and better performing fasteners. Products such as
the famous Unbrako® socket head cap screw and Durlok®
fasteners are the solutions of choice for engineering
applications across the world & is used by industries such as
the automotive, power generation, petrochemical, heavy
machinery, construction and military sectors. .
With advanced manufacturing, engineering and logistics
facilities, ISO/TS and CE certification, Unbrako is equipped to
provide technical support and full-service package. Unbrako's
focus is on building long term relationships with its
customers. Full-service includes engineering and design
support, procurement and purchasing services, localized
warehousing and transport, a variety of packaging options
and choice of delivery frequencies – to provide the right
answer to any customer need. .
Unbrako products are primarily used in performance critical
applications and incorporate unique design and workmanship
features that meet or exceed recognized international
standards, resulting in higher tensile strength, improved
fatigue resistance, improved ease of installation, reduced
total cost of maintenance and extended life cycle. .
Utilizing its international network in 35 countries, Unbrako
provides a complete range of industrial fastening hardware
including bolts, screws, SEM's, nuts, studbolts, self-locking
fasteners, thread forming fasteners, among others. .
State-of-the-art
Heat Treatment
Process
Longest Heat Treatment Capacity
Largest Cold Forgers in the world
BSI
0045 TUVRheinland
2
Prestigious Petrochemical Clientele
Quality And Reliability
Test Certificates
Tests are carried out in our laboratory. Test results, certified by our Quality Assurance department
are available at shipment of products, against invoice, as and when requested by our customers.
In-house Destructive And Non-destructive Testing :
Hardness tests
Uts test
Proof load test
Macrotech tests
Microtech tests
Spectrometer
Tensile Testing Metallurgical Microscope
X-Ray Fluorescence Analyzer
Projects And Development India Limited
Petroleum Development Oman
KNPC
Engineers India Limited
Grains size
Decarburization tests
Ultra soud testing
M.P.I tests
Stress rupture tests
Chemical product check analysis
Heat treatment tests
0 Room temprature tension tests (or at 0 C)
0 Low temperature impact tests (upto -196 c)
X-Ray Fluorescence Analysis
Unbrako®
3
U Snbrako tudbolts
For Gas, Petroleum & Chemical IndustriesISO 9001:2008 and ISO/TS 16949:2002 Quality Assured
Material
Chemical and mechanical requirements should be specified at the time of purchase and
will be in accordance with ASME, ASTM, and ANSI codes and specifications as
applicable at the time of ordering.
How To MeasureStud bolt length is determined by the measurement from the first full thread to the last full thread.
The first and last full thread is determined as the intersection of the major diameter of the thread
with the base of the point. (refer to the diagram).
Length
Diameter
Studbolt for high pressure - temperature
* Highlighted items can be made-to-order.
DIAMETER RANGE : Imperial : 3/8" to 4"
Metric : M10 to M100
A193 Grade B7
A193 Grade B7M
A193 Grade B8
A320 Grade B8M
A193 Grade B16
A320 Grade L7
A320 Grade L7M
A193 Grade B5
A193 Grade B6
A193 Grade B8T
Cr - Mo
Cr - Mo
18 Cr - 8 Ni
18 Cr - 10 Ni - 2 Mo
Cr MoV
Cr - Mo
Cr - Mo
5 Cr
12 Cr
18 Cr - 10 Ni - Ti
4140 / 4142 / 4145
4140 / 4142 / 4145
304
316
EN 40CrMoV4
4140 / 4142 / 4145
4140 / 4142 / 4145
501
410
321
A194 Grade 2H
A194 Grade 2HM
A194 Grade 8
A194 Grade 8M
A194 Grade 4 or 7
A194 Grade 4 or 7
A194 Grade 4M or 7M
A194 Grade 3
A194 Grade 6
A194 Grade 8T
DFL STUDBOLTS (ASTM Spec)
Screw Fastening Material (generic)
MaterialCOMPATIBLE NUTS
(ASTM Spec)
LENGTH : Imperial : upto 10 feet
Metric : upto 3 meters
4
ThreadsThreads are Unified inch coarse thread series (UNC), Class 2A, for all stud bolt sizes 1 inch
and smaller, and Unified inch 8 thread series (UN8), class 2A, for all stud bolts larger than
1 inch, in accordance with ANSI/ASME B1.1. Acceptability of screw threads is determined
based on ANSI/ASME B1.3.
Points are flat and chamfered, or sheared at option of the manufacturer. When points are flat
and chamfered, the diameter of the flat shall not exceed the minor diameter of the thread, and
shall be not less than one or more than two complete threads as measured from the extreme end
parallel to the axis.
Points
How To Order
Important information to be provided while ordering:
Nominal Thread Diameter
Nominal Length in millimeters for studbolts
(Refer to “how to measure”)
The Standard to which the product is required
Finish / Coating Required
Material Grade
Test Certificate Requirements
Unbrako®
5
Studbolt Material SpecificationASTM A-193/ASME SA-193
CHEMICAL REQUIREMENTS
MECHANICAL REQUIREMENTS
AUSTENITIC STEELF E R R I T I C ST E E L
AISI
DIN
W.-NR.
501
12CrM0
19-5
1.7362
B5 B6 B7 B7M B16 B8 B8M B8T B8C
410
X10Cr13
1.4006
4140
42CrMo4
1.7225
24CrM0
V55
1.7711
304
X5CrNi
18-8
1.4301
316
X5CrNiMo
17-12-2
1.4401
321
X6CrNiTi
18-10
1.4541
347
X6CrNiNb
18-10
1.4550
C %
Mn %
Si %
P max %
S max %
Cr %
Ni %
Mo %
V %
Al Max. %
Tl %
Cb+Ta
0,10 min
1 max
1 max.
0,040
0,030
4-6
0,40-0,65
0,08-0,15
1 max
1 max.
0,040
0,030
11,5-13,5
0,37-0,49
0,65-1,10
0,15-0,35
0,035
0,040
0,75-1,20
0,15-0,25
0,36-0,47
0,45-0,70
0,15-0,35
0,035
0,040
0,80-1,15
0,50-0,65
0,25-0,35
0,015
0,08 max.
2 max
1 max.
0,045
0,030
18-20
8-11
0,08 max.
2 max
1 max.
0,045
0,030
16-18
10-14
2-3
0,08 max.
2 max
1 max.
0,045
0,030
17-19
9-12
0,08 max.
2 max
1 max.
0,045
0,030
17-19
9-12
5x(C+N) min.
0,70 max.
10xC min.
1,10 max.
Diameter
T.S. min. Mpa
Y.S min. 0.2% Mpa
Elongation min.%
Red. of Area min.%
Hardness max. HB
Diameter
T.S. min. Mpa
Y.S min. 0.2% Mpa
Elongation min.%
Red. of Area min.%
Hardness max. HB
Diameter
T.S. min. Mpa
Y.S min. 0.2% Mpa
Elongation min.%
Red. of Area min.%
Hardness max. HB
up to 4”
690
550
16
50
up to 4”
760
585
15
50
2 1/2”
and under
860
720
16
50
321
B7
2 1/2”
and under
2 1/2”
and under
690
550
18
50
235
860
725
18
50
321
B7M B16 B8 CL2 - B8T CL2 - B8C CL2
Class 1: all Diameters
515
205
30
50
223
515
205
30
50
223
515
205
30
50
223
515
205
30
50
223
over 2 1/2”
to 4
795
655
16
50
321
over 2 1/2”
to 4
690
550
18
50
235
760
655
17
45
321
over 2 1/2”
to 4
860
690
12
35
321
3/4”
and under
over 3/4”
to 1”
over 1”
to 1 1/4”
over 1 1/4”
to 1 1/2”
795
550
15
35
321
725
450
20
35
321
690
345
28
45
321
B7 B7M B16 B8M CL2
over 4”
to 7”
over 4”
to 7”
over 4”
to 7”
3/4”
and under to 1”
over 3/4”
to 1 1/4”
over 1”
to 1 1/2”
over 1 1/4”
690
515
18
50
321
690
515
18
50
235
690
586
16
45
321
760
655
15
45
321
690
550
20
45
321
655
450
25
45
321
620
345
30
45
321
Alloy steel & stainless steel bolting for high-temperature
6
Studbolt Material SpecificationASTM A-320 & ASTM A-307
CHEMICAL REQUIREMENTS
MECHANICAL REQUIREMENTS
ASTM A-320 / ASME SA-320Alloy steel bolting for low-temperature
ASTM A-307 / SA-307Carbon steel bolts and nuts
F E R R I T I C ST E E L AUSTENITIC STEEL CARBON STEEL
L7 L7M L43 B8 B8M B8T B8C GR.A GR.B GR.C
AISI
DIN
W.-Nr.
4140
42CrMo4
1.7225
4340
40NiCr
Mo6
1.6565
304
X5CrNi18-8
1.4301
316
X5CrNiMo
17-12-2
1.4401
321
X6CrNiTi
18-10
1.4541
347
X6CrNiNb
18-10
1.4550
C %
Mn %
Si %
P max %
S max %
Cr %
Ni %
Mo %
Tl %
Cb+Ta
0,38-0,48
0,75-1,00
0,15-0,35
0,035
0,040
0,80-1,10
0,15-0,25
0,38-0,43
0,60-0,85
0,15-0,35
0,035
0,040
0,70-0,90
1,65-2,00
0,20-0,30
0,08 max.
2 max.
1 max.
0,045
0,030
18-20
8-11
0,08 max.
2 max.
1 max.
0,045
0,030
16-18
10-14
2-3
0,08 max.
2 max.
1 max.
0,045
0,030
17-19
9-12
0,08 max.
2 max.
1 max.
0,045
0,030
17-19
9-12
0,29 max.
0,90 max.
0,50 max.
0,04 max.
0,15 0,05
5xC min
10 x C min.
1,10 max.
Diameter
T.S. min. Mpa
Y.S min. 0.2% Mpa
Elongation min.%
Red. of Area min.%
Impact. Test Min. (J)
Temp.
Hardness max. HB
Diameter
T.S. min. Mpa
Y.S min. 0.2% Mpa
Elongation min.%
Red. of Area min.%
Hardness max. HB
Diameter
T.S. min. Mpa
Y.S min. 0.2% Mpa
Elongation min.%
Red. of Area min.%
Hardness max. HB
2 1/2”
and under
2 1/2”
and under
4”
and under
860
725
16
50
690
550
18
50
860
725
16
50
515
205
30
50
515
205
30
50
515
205
30
50
515
205
30
50
415
18
415-690
18
400-500
248
23
Class 1: all Diameters All Diameters
Ind. (20) med. (27)0-101 C 0-73 C
235
0-101 C
223 223 223 223 121-241 121-212
B8 CL2 - B8T CL2 - B8C CL2
3/4”
and under
860
690
12
35
321
over 3/4”
to 1”
795
550
15
35
321
over 1”
to 1 1/4”
over
to 1 1/2”
1 1/4”
725
450
20
35
321
690
345
28
45
321
B8M CL2
3/4”
and under
over 3/4”
to 1”
over 1”
to 1 1/4”
over
to 1 1/2”
1 1/4”
760
655
15
45
321
690
550
20
45
321
655
450
25
45
321
620
345
30
45
321
Unbrako®
7
MECHANICAL REQUIREMENTS
CHEMICAL REQUIREMENTS
EQUIVALENCE
Brinell
Hardness
Limits
0.40_>
_>1
0.04
0.05
0.40_>
0.40_>
_>1
0.04
0.05
0.40_>
0.10_>
_>1
0.04
0.03
_>1
0.40-0.50
0.70-0.90
0.035
0.04
0.15-0.35
4-6
0.40-0.65 0.20-0.30
0.15_>
1.00_>
0.04
0.03
_>1 _>1
0.06
0.06
1.25_>
0.15_> 0.37-0.49
0.65-1.10
0.035
0.04
0.15-0.35 0.15-0.35
0.04
11.5-13.5 12-14
_> 0.15
0.75-1.20
0.15-0.25
0.75-1.20
0.15-0.25
0.035
0.65-1.10
0.37-0.49 0.08_>
2_>
0.045
0.03
_>1
0.08_>
2_>
0.045
0.03
_>1
0.08_>
2_>
0.045
0.03
_>1
0.08_>
2_>
0.045
0.03
_>1
8-11 9-12
17-1918-20
10-14
16-18
9-12
17-19
2-3
5xC+Nmin.
0.7 max.
10xC.min.
To 1 1/2”inc.
248-327
Over 1 1/2”212-327
159
235
248
327 327 271 271 327 235 300 300 300 300
126126126126159248228228248
1040
K04002
1040
K04002
501
550100
C45 C4512CrMo
19-5
1.1191 1.1191 1.7362
K14510
410 416 Se
S41000 S41623
X10Cr13
1.4006
4140
G41400
42CrMo4 42CrMo4
1.7225 1.7225
S 30400
4140 304 321
S 32100
X5CrNi18.8
X10CrNiTi 18.10
1.4301 1.4541 1.4401 1.4550
X5CrNiMo
17-12-2
X6CrNiNb
18.10
G 41400 S 31600 S34700
316 347
C %
Mn %
P max. %
S max. %
Si %
Ni %
Cr %
Mo %
Ti %
Se %
Cb + Ta %
AISI
UNS
DIN
W-NR
2H 2HM 3 4 6 6F 7 7M 8 8T 8M 8CGrade
• Please enquire for the material available
Nut Material SpecificationASTM A-194/ASME SA-194
Carbon And Alloy Steel Nuts
8
Influence Of Chemicals In Steel
Steel alloys using difference chemical elements are produced in order to improve the physical
properties of the material and to achieve special properties:
Carbon (C)
Although this is not considered to be an alloying element, it is the most important component in steel. It improves tensile strength, hardness and abrasion resistance. It reduces ductility, rigidity and machining.
Manganese (Mn)
This is an oxidiser and degasifier and reacts with sulphur to improve forgeability. It increases
tensile strength, hardness and durability.
Phosphorus (P)
This increases tensile strength and hardness and improves machinability. It causes fragility in steel.
Sulphur (S)
Improves machining qualities in the presence of manganese. It reduces weldability, impact,
roughness, and ductility.
Silicon (Si)
This is a deoxidiser and degasifier. It increases tensile strength, elasticity, hardness and forgeability.
Chromium (Cr)
Increase breaking strength, hardness, durability, roughness, and resistance to high temperatures.
Nickel (Ni)
This raises strength and hardness, while maintaining ductility and rigidity. It increases resistance
to cracking and high temperatures.
Molybdenum (Mo)
This increases strength, hardness, durability, and rigidity, together with resistance to creaking
and to high temperatures.
Titanium (Ti)
This is used as a stabilising element in stainless steels. It has a great affinity for carbon.
Unbrako®
9
Properties Of Steel
B6
B7
B7M
B16
B8 (A- 193)
B8 (A- 320)
B8M (A-193)
B8M (A-320)
B8C (A-193)
B8C (A-320)
B8T (A-193)
B8T (A-320)
B5
PROPERTYQUALITY
Good resistance in corrosive environments (crude oil, petroleum, organic acids, organic
solvents, ammonia), but not in highly corrosive environments. Good resistance to corrosion 0up to a temperature of 650 C, good weldability.
0 0Good strength and hardness, above all for uses in conditions of high temp. (-10 C to +427 C)
Applications: Petrochemicals, valves, pumps.
Similar to B7 but with lower mechanical properties.
Applications: Petrochemical Industry.
0 0Prescribed for good strength and hardness in conditions of high (-10 C 558 C)
Applications: Petrochemical Industry.
temp. to +
0 0Used in temperatures of between -196 C and +538 C. Good resistance to intercrystalline
corrosion, and excellent weldability.
Applications: Petrochemicals, chemicals, pharmaceuticals, foodstuffs and ironwork.
0 0Good resistance to corrosion. Suitable for uses at low temperatures (-254 C +500 C)
Applications: Chemical, pharmaceutical, and foodstuffs Industries.
to
Excellent resistance to intercrystalline corrosion and to corrosion caused by Cl ions.0 0Temperature range (-196 C + 538 C). to
0 0Good resistance to corrosion. Indicated for temperatures between -196 C and +50 C.
Applications: Chemical and petrochemical industries.
0 0High resistance to intergranular corrosion and oxidation. Used for temperatures of (-196 C +538 C).
Applications: Petrochemical industry, changes of temperature and in the construction of structures for
chemical plants.
to
0 0Good resistance to corrosion. Indicated for temperatures of (-254 C to +50 C).
Applications: Chemical and petrochemical industries.
0 0Indicated for the range of temperatures between (-196 C to +538 C). High resistance to
intergranular corrosion Due to the presence of Titanium. Good weldability without the requirement
for additional heat treatment.
Applications: Petrochemical, chemical, foodstuffs industries, and energy generator plants.
0 0Used for temperatures of (-101 C /+500 C). Applications: petrochemical Industry.
For use in high temperature conditions.
Applications: Petrochemical industry, valves and flanges.
10
Properties Of Steel
Excellent mechanical properties for use at high temperatures.
Applications : Pressure equipment and flangers
0 0Good strength and hardness, excellent for use at low temp. (-101 C to +50 C).
Applications: Petrochemical Industry.
Similar to L7 but with lower mechanical properties.
Applications: Petrochemical Industry.
High strength, good weldability, perfect resistance to corrosion under a wide range of temp and
conditions (sea water, mineral and organic acidity).
Applications: Valves, pumps, marine installations, petrochemical plants, changes of temperature,
and for uses in contact with sulphuric and hydrochloric acids.
Greater mechanical strength and resistance to abrasion than Monel 400.
Applications: Valve, pumps, petrochemical plants, and fasteners.
Excellent resistance to both oxidising and reducing environments, as well as in corrosive
environments at high temp.
Applications: Equipment for the chemical, textile, foodstuffs industries kilns.and
0Great mechanical strength from cryogenic temp up to very high temp (1100 C). Excellent resistance
to fatigue and oxidation.
Applications: Chemical industry, marine equipment, pipes and valves.
0Resistance to corrosion and carbonisation at high temp (up to 1100 C). Resistant to attack by
sulphides, corrosion and pickling.
Applications: Changes of temperature, heat equipment, generators.
Excellent resistance to breaking due to corrosion, resistant to oxidising and reducing environments.
Applications: Deoxidising tanks, chemical industry, pollution control systems.
Good resistance to breaking due to corrosion in the presence of chlorine compounds, resistance to
intercrystalline corrosion.
Application: Employed in environment with sever chemical processes, in the paper industry, and in
pollution control.
Very high resistance to breaking due to corrosion.
Application: Chemical and oil industries, pipes, flanges, valves for use at high temp.
Perfect resistance to interstitial corrosion and corrosive environments.
Application: Marine installations and petrochemical industries,
GR.660
L7
L7M
Monel 400
Monel 500
Inconel 600
Inconel 625
Incoloy 800H
Incoloy 825
Hastelloy C276
Duplex 2205
Superduplex
32760
QUALITY PROPERTY
Unbrako®
11
Dimensions Of Metric Nuts
Metric Nuts In 2H Material Are Manufactured To DIN 934, H=D Dimensions.
M 8
M 10
M 12
M 14
M 16
M 18
M 20
M 22
M24
M 27
M 30
M 33
M 36
M 39
M 42
M 45
M 48
M 52
M 56
M 60
M 64
M 68
M 72
M 76
M 80
M 85
M 90
M 95
M 100
13
17
19
22
24
27
30
32
36
41
46
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
130
135
145
8
10
12
14
16
18
20
22
24
27
30
33
36
39
42
45
48
52
56
60
64
68
72
76
80
85
90
95
100
1,25
1,50
1,75
2,00
2,00
2,50
2,50
2,50
3,00
3,00
3,50
3,50
4,00
4,00
4,50
4,50
5,00
5,00
5,50
5,50
6,00
6,00
6,00
6,00
6,00
6,00
6,00
6,00
6,00
0,6
1,4
2
3,1
4
5,8
7,9
9,4
13,7
20
28,4
36,1
48,3
62,3
79,5
98,8
122
147
177
208
245
284
327
374
425
483
606
680
835
Across Flat
(Min/Max)
Size
Diameter
Weight ( Per 100 Nuts
kg)ISO Thread (Pitch)
Nut Height
METRIC SERIES
12
Dimensions Of Imperial Nuts
For Imperial Studbolts Heavy Hexagon Nuts Are Used,
Complying To AS 2528 & ANSI B18 2.2 For Heavy Hex Nuts.
Threads Per Inch (Pitch)
Weight ( Per 100 Nuts
kg)
In mm
Across Flat Nut Height
Min/Max
3/8”
7/16”
1/ 2”
9/16”
5/8”
3/4”
7/8”
1”
1 1/8”
1 1/4”
1 3/8”
1 1/2”
1 5/8”
1 3/4”
1 7/8”
2”
2 1/4”
2 1/2”
2 3/4”
3”
3 1/4”
3 1/2”
3 3/4”
4”
0.375
0.437
0.500
0.562
0.625
0.750
0.875
1.000
1.125
1.250
1.375
1.500
1.625
1.750
1.875
2.000
2.250
2.500
2.750
3.000
3.250
3.500
3.750
4.000
17.4
19
22.2
23.8
27
31.7
36.5
41.2
46
50.8
55.5
60.3
65
69.8
74.6
79.3
88.9
98.4
108
118
127
136.5
146
155.6
3/8”
7/16”
1/ 2”
9/16”
5/8”
3/4”
7/8”
1”
1 1/8”
1 1/4”
1 3/8”
1 1/2”
1 5/8”
1 3/4”
1 7/8”
2”
2 1/4”
2 1/2”
2 3/4”
3”
3 1/4”
3 1/2”
3 3/4”
4”
1.4
1.9
3.0
3.7
5.4
8.8
13.5
19.3
26.9
35.7
46.3
59.5
73.6
92.7
109.5
135.8
190.3
256.0
335.0
432.0
543
694
824
991
16
14
13
12
11
10
9
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
Size
Diameter
UNC/UN8 INCH SERIES
Unbrako®
13
ASTM F436-M Washer
Hardness 38-45 HRC
Hardness for hot dip Galvanised finish 26-45 HRC
Washer
Size, mm
Inside
Diameter, mm
12
14
16
20
22
24
27
30
36
42
48
56
64
72
80
90
100
14.4
16.4
18.4
22.5
24.5
26.5
30.5
33.6
39.6
45.6
52.7
62.7
70.7
78.7
86.9
96.9
107.9
14.0
16.0
18.0
22.0
24.0
26.0
30.0
33.0
39.0
45.0
52.0
62.0
70.0
78.0
86.0
96.0
107.0
27.0
30.0
34.0
42.0
44.0
50.0
56.0
60.0
72.0
84.0
95.0
107.0
118.0
130.0
142.0
159.0
176.0
25.7
28.7
32.4
40.4
42.4
48.4
54.1
58.1
70.1
81.8
92.8
104.8
115.8
127.5
139.5
156.5
173.5
4.6
4.6
4.6
4.6
4.6
4.6
4.6
4.6
4.6
7.2
7.2
8.7
8.7
8.7
8.7
8.7
8.7
3.1
3.1
3.1
3.1
3.4
3.4
3.4
3.4
3.4
4.6
4.6
6.1
6.1
6.1
6.1
6.1
6.1
min max min min max max
Outside
Diameter, mmThickness, mm
Mechanical Properties ASTM-F-436M
ElementType 1 Type 3
0.040
0.050
0.15-0.35
0.45-0.65
0.25-0.45
0.25-0.45
0.040
0.050
.....
.....
.....
.....
Phosphorus, max
Sulfur, max
Silicon
Chromium
Nickel
Copper
Composition.%
Chemical Requirements ASTM F-436M
14
ASTM F436 Washer, Inch
Hardness 38-45 HRC
Hardness for hot dip Galvanised finish 26-45 HRC
Mechanical Properties ASTM-F-436
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1 1/8
1 1/4
1 3/8
1 1/2
1 3/4
2
2 1/4
2 1/2
2 3/4
3
3 1/4
3 1/2
3 3/4
4
0.625
0.688
0.813
0.922
1.063
1.188
1.313
1.468
1.750
2.000
2.250
2.500
2.750
3.000
3.375
3.750
4.000
4.500
5.000
5.500
6.000
6.500
7.000
7.500
0.281
0.344
0.406
0.469
0.531
0.625
0.688
0.813
0.938
1.063
1.188
1.375
1.500
1.625
1.875
2.125
2.375
2.625
2.875
3.125
3.375
3.625
3.875
4.125
0.051
0.051
0.051
0.051
0.097
0.110
0.122
0.122
0.136
0.136
0.136
0.136
0.136
0.136
B0.178
B0.178
C0.24
C0.24
C0.24
C0.24
C0.24
C0.24
C0.24
C0.24
Size
Outside
Diameter(OD)
Inch
Inside
Diameter(ID),
Inch
Thickness(T), Inch
Min Max
Chemical Requirements ASTM F-436
0.080
0.080
0.080
0.080
0.177
0.177
0.177
0.177
0.177
0.177
0.177
0.177
0.177
0.177
B0.28
B0.28
C0.34
C0.34
C0.34
C0.34
C0.34
C0.34
C0.34
C0.34
ElementType 1 Type 3
0.040
0.050
0.15-0.35
0.45-0.65
0.25-0.45
0.25-0.45
0.040
0.050
.....
.....
.....
.....
Phosphorus, max
Sulfur, max
Silicon
Chromium
Nickel
Copper
Composition.%
B 3/16 Inch NominalC 1/4 Inch Nominal
Unbrako®
15
Preparation For Assembly
The gasket seating surfaces should be inspected for cracks, scratches, tool marks or pitting. If necessary
rework the flanges.
Clean and inspect each studbolt and nut. Nuts should run freely on the studbolt.
Make sure that compatible materials of studbolts and nuts are used.
1.
2.
3.
Recommended Fasteners For Different Working Conditions
SERVICE CONDITION
HIGH PRESSURE
HIGH TEMPERATURE
HIGH
HIGH CORROSIVE
TEMPERATURE
HIGH PRESSURE
LOW TEMPERATURE
LOW TEMPERATURE
STUDBOLTS
ASTM A193 Gr. B5
ASTM A193 Gr. B6
ASTM A193 Gr. B7
ASTM A193 Gr. B7.M
ASTM A193 Gr. B16
ASTM A 453 Gr. 660
ASTM A 453 Gr. 651
ASTM A193 Gr. B8
ASTM A193 Gr. B8L
ASTM A193 Gr. B8M
ASTM A193 Gr. B8ML
ASTM A320 Gr. L7
ASTM A320 Gr. L43
ASTM A320 Gr. B8
ASTM A320 Gr. B8C
ASTM A320 Gr. B8M
ASTM A320 Gr. B8T
ASTM A194 Gr. 3
ASTM A194 Gr. 6
ASTM A194 Gr. 2H
ASTM A194 Gr. 2HM
ASTM A194 Gr. 4or7
ASTM A194 Gr. 8C
ASTM A193 Gr. 8C
ASTM A194 Gr. 8
ASTM A194 Gr. 8L
ASTM A194 Gr. 8M
ASTM A194 Gr. 8ML
ASTM A194 Gr. 4 or 7
ASTM A194 Gr. 7
ASTM A194 Gr. 8
ASTM A194 Gr. 8C
ASTM A194 Gr. 8M
ASTM A194 Gr. 8T
NUTS
4. Lubricate all studbolts and nuts with suitable parting lubricants or anti-seize compounds, including all
thread contact areas and nut faces in the process. Different lubricants produce changes to the coefficient
of friction between the bolt and nut threads. Approximate values are shown in the following table.
However, note that surface finish of flanges may also affect these values.
.
16
Lubricant
No lubricant. clean stainless steel studbolts & nuts
No lubricant. clean steel studbolts & nuts
Zinc plated, dry
Machine oil
Molybdenum disulphide based grease
Copper based anti-seize
Solid PTFE film
Coefficient of Friction
0.30
0.25
0.29
0.20
0.15
0.15
0.04 to 0.10
Inspect the gasket for any damage or imperfections and ensure the gasket is suitable for the flange
operating conditions of temperature, pressure and material being sealed.
5.
For a given torque, clamping load applied by the studbolts and nuts increases as the coefficient of friction
decreases. And a lower coefficient of friction means a better chance of producing reliable joints.
During Assembly, gaskets are usually placed between the flanges being bolted. First, roughly align
the gasket in the joint by inserting a few bolts at the top of the flange. Then, lightly tighten all the
other bolts. During the Tightening process the correct sequence (as illustrated below) should be used.
Tightening should be continued in a clockwise manner until the desired torque is achieved. If using a
torque wrench make sure it is properly calibrated. .
1
2
4 3
1
2
4 3
10
9
6
5
7
8
11
12
1 9241716
58
12 21
4 3
20 13
22 11
14 19
6 718 15
10 232
The sketch above shows the sequence for 4, 12 and 24 bolt flanges
Assembly And Tightening
Preparation For AssemblyUnbrako®
17
18
Tightening Torques
In the following pages tightening torque figures are calculated for the studbolt range. We have assumed coefficient of
friction of 0.20, and torque figures have been generated for clamping loads of 30%, 44% and 60% of yield loads.
Adjustments where necessary should be made. Tightening torque is calculated as T=KDP, whereby T = Tightening
Torque, K = Coefficient of Friction, D = Diameter of Stud Bolt and P = Induced Load.
.
Common industry practice for industrial bolting is to specify tightening torques to develop clamping loads of
60% to 65% of yield load. However, for studbolts, field experience suggests that clamping loads of more than
44% of yield load may cause deformation of flanges and difficulty in sealing joints. This fact should be accounted
for in estimating tightening torque values. Some authorities adopt the flange deformation stress as the controlling
factor. This allows the selection of single bolt stress value for a range of pipe classes even if different bolt types are
in use. .
ASTM A-193 Grade B-7 Stud Bolts Metric Dimensions
NOTE:- Torque values calculated are for initial guidance only and should be checked as per actual usage.
Dia
mm
Tensile Strength
ksi [MPa] min
Yield Strength
ksi [MPA] min
_< M64 125 [860] 105 [720]
25
44
69
108
149
212
288
366
536
727
989
1271
1644
37
64
102
150
220
312
424
540
790
1071
1458
1872
2423
50
87
139
217
299
423
576
732
1071
1454
1979
2541
3289
M10
M12
M14
M16
M18
M20
M22
M24
M27
M30
M33
M36
M39
1.50
1.75
2.00
2.00
2.50
2.50
2.50
3.00
3.00
3.50
3.50
4.00
4.00
41.8
60.7
82.8
113.0
138.2
176.4
218.2
254.2
330.5
403.9
499.7
588.2
702.7
9397
13646
18614
25403
31069
39656
49053
57146
74300
90800
112337
132233
157973
18
32
51
80
110
156
211
270
395
536
729
936
1212
27
47
75
117
161
229
311
396
579
786
1069
1373
1777
37
64
102
159
219
310
422
537
785
1066
1451
1863
2412
Diamm
Thread
Pitch
Yield
Load
KN
Yield
Load
IbfNmft.lbsNmft.lbsft. Ibs
For 44% of Yield Load For 60% of Yield Load
Tightening Torques
For 30% of Yield Load
Nm
Unbrako®
19
Tightening Torques
ASTM A193 GRADE B7,B-16 & ASTM A-320 L-7 Studbolts Imerial Dimensions
NOTE:- Torque values calculated are for initial guidance only and should be checked as per actual usage.
Yield Strength
ksi [MPA] min
_< 2 ½
> 2 ½ to 4
125 [860]
115 [795]
105 [720]
95 [655]
Dia inch
Tensile ksi [MPa] min
Strength
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
11/8
1 1/4
1 3/8
1 ½
1 5/8
1 3/4
1 7/8
2
2 1/4
2 ½
2 3/4
3
3 1/4
3 1/2
Dia inch
16 UNC
14 UNC
13 UNC
12 UNC
11 UNC
10 UNC
9 UNC
UN8
UN8
UN8
UN8
UN8
UN8
UN8
UN8
UN8
UN8
UN8
UN8
UN8
UN8
UN8
ThreadYield Load
Ibf
Yield Load
N
ft.lbs Nm ft.lbs Nm ft.lbs Nm
41
66
101
146
201
357
575
862
1265
1780
2414
3186
4118
5182
6433
7887
11276
15802
19234
25155
32191
40393
31
49
75
107
148
263
424
636
933
1313
1780
2350
3037
3822
4745
5817
8411
11655
14186
18554
23743
29792
30
48
74
107
147
262
422
633
928
1305
1770
2336
3020
3801
4717
5784
8269
11588
14105
18447
23607
29621
22
36
55
79
109
193
311
467
684
963
1305
1723
2227
2803
3479
4266
6099
8547
10403
13607
17411
21847
21
33
51
73
101
178
288
431
633
890
1207
1593
2060
2591
3216
3944
5638
7902
9617
12578
16096
20196
15
24
37
54
74
132
212
318
467
656
890
1175
1519
1911
2372
2909
4205
5828
7093
9277
11871
14896
36210
49510
66325
85005
105550
156000
215780
283040
368980
467065
575890
696860
831370
971490
1125620
1293765
1662745
2073760
2294615
2751005
3249650
3786325
8140
11130
14910
19110
23730
35070
48510
63630
82950
105000
129465
156660
186900
218400
253050
290850
373800
466200
515850
618450
730550
851200
For 30% of Yield Load For 44% of Yield Load For 60% of Yield Load
Tightening Torques
20
Tightening Torques
ASTM A-193 Grade B-7M Stud Bolts Imperial Dimensions
_< 2 1/2 100 [690] 80 [550]
DiaTensile Strength
ksi [MPa]min
Yield Strength
ksi [MPA] min
38
55
77
136
219
329
482
678
919
1214
1569
1974
2451
3005
57
82
113
200
323
485
711
1000
1356
1790
2314
2912
3615
4432
77
111
153
272
438
657
964
1356
1839
2427
3137
3948
4901
6009
1/2
9/16
5/8
3/4
7/8
1
1 1/8
1 1/4
1 3/8
1 ½
1 5/8
1 3/4
1 7/8
2
UNC
UNC
UNC
UNC
UNC
UNC
UN8
UN8
UN8
UN8
UN8
UN8
UN8
UN8
11360
14560
18080
26720
36960
48480
63200
80000
98640
119360
142400
166400
192800
221600
50532
64766
80424
118857
164406
215650
281127
355858
438773
530940
633427
740184
857617
985726
28
41
57
100
162
242
356
500
678
895
1157
1456
1808
2216
42
60
83
147
237
356
521
733
995
1313
1697
2135
2651
3250
56
81
112
199
322
482
707
994
1349
1780
2301
2895
3594
4407
Dia Thread
Yield
Load
lbf
Yield
Load
NNmft.lbsNmft.lbsft. Ibs
For 44% of Yield Load For 60% of Yield Load
Tightening Torques
For 30% of Yield Load
Nm
NOTE:- Torque values calculated are for initial guidance only and should be checked as per actual usage.
Unbrako®
21
Proof Load (Metric)
Proof Load Using Threaded Mandrel
20.8
37.9
60.0
87.3
119.0
162.5
253.6
313.6
365.4
475.1
580.6
845.6
M6
M8
M10
M12
M14
M16
M20
M22
M24
M27
M30
M36
1.0
1.25
1.50
1.75
2.0
2.0
2.5
2.5
3.0
3.0
3.5
4.0
20.1
36.6
58.0
84.3
115.0
157.0
245.0
303.0
353.0
459.0
561.0
817.0
16.6
30.2
47.9
69.5
94.9
129.5
202.1
249.9
291.2
378.7
462.8
674.0
18.7
34.0
53.9
78.4
107.0
146.0
227.8
281.8
328.3
426.9
521.7
759.8
10.4
18.8
29.9
43.4
59.2
80.9
126.2
156.0
181.8
236.4
288.9
420.8
Nominal
Size
Inch (mm)
Thread
Pitch
Stress
Area2mm
AProof Looad, KN
EHex
All Types of Grade 8,
& Grades 9C and 9CA
DHex
Grades 2H, 3, 4,
7, 16
BHex
Grade 1
CHex
Grades 2, 2HM, 6,
6F, 7M
A See limit for proof load test in 18.2.2.1. The proof load for jam nut shall be 46% of the tabulated load.
B Based on proof stress of 825 Mpa.
C Based on proof stress of 935 Mpa.
D Based on proof stress of 1205 Mpa.
E Based on proof stress of 515 Mpa.
NOTE: Proof loads are not design loads.
22
Proof Load (Imperial)
Proof Load Using Threaded Mandrel
4 130
6 810
10 080
13 820
18 450
23 660
29 380
43 420
60 060
78 780
102 700
130 000
160 200
194 000
[18.4]
[30.3]
[44.8]
[61.5]
[82.1]
[105]
[131]
[193]
[267]
[350]
[457]
[578]
[713]
[863]
5 570
9 170
13 560
18 600
24 830
31 850
39 550
58 450
80 850
106 000
138 200
175 000
215 800
261 100
[24.8]
[40.8]
[60.3]
[82.7]
[110]
[142]
[176]
[260]
[360]
[472]
[615]
[778]
[960]
[1161]
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1/81
1/41
3/81
1/21
20
18
16
14
13
12
11
10
9
8
8
8
8
8
0.0316
0.0524
0.0774
0.1063
0.1419
0.182
0.226
0.334
0.462
0.606
0.79
1.000
1.233
1.492
[20.4]
[33.8]
[49.9]
[68.6]
[91.5]
[117]
[146]
[215]
[298]
[391]
[510]
[645]
[795]
[962]
[6.4]
[7.9]
[9.5]
[11.1]
[12.7]
[14.2]
[15.9]
[19]
[22.2]
[25.4]
[28.6]
[31.8]
[34.9]
[38.1]
4 770
7 860
11 620
15 940
21 280
27 300
33 900
50 100
69 300
90 900
118 500
150 000
185 000
223 800
[21.2]
[35.0]
[51.7]
[70.9]
[94.6]
[121]
[151]
[223]
[308]
[404]
[527]
[667]
[823]
[996]
2 540
4 190
6 200
8 500
11 350
14 560
18 080
26 720
36 960
48 480
63 200
80 000
98 640
119 360
[11.3]
[18.6]
[27.6]
[37.8]
[50.5]
[64.8]
[80.4]
[119]
[164]
[216]
[281]
[356]
[439]
[531]
Nominal Size
Inch [mm]
Treads per inch
[25.4 mm]
Stress Area,2 2inch [mm ]
BHeavy HexGrade 1
2 2inch [mm ]
EHeavy Hex
All Types of grade 82 2inch [mm ]
C Heavy Hex
Gr. 2, 2HM, 6, 6F, 7M2 2inch [mm ]
D Heavy Hex
Gr. 2H, 3, 4, 7, 162 2inch [mm ]
AProof Looad, KN
A See limit for proof load test in 18.2.2.1. The proof load for jam nut shall be 46% of the tabulated load.
B Based on proof stress of 130,000 psi
C Based on proof stress of 150,000 psi
D Based on proof stress of 175,000 psi
E Based on proof stress of 80,000 psi
NOTE: Proof loads are not design loads.
Unbrako®
23
Studbolt Sizes For Flanges
(Pn20) (Class 150)
DN 750, 900 TO BS 3293 DIN 15 TO 600 CONFORM TO ANSI B16.5
NOTE
1.
2.
3.
4.
Imperial lengths are an approximate conversion.
Face height of 2mm is included in stud length for RF type flange.
Stud bolt length does not include points (refer to how to measure).
Stud bolt lengths are rounded to nearest 5mm.
15
20
25
32
40
50
65
80
90
100
125
150
200
250
300
350
400
450
500
600
750
900
1/ 2”
3/4”
1”
1 1/4”
1 1/2”
2”
2 1/2”
3”
3 1/2”
4”
5”
6”
8”
10”
12”
14”
16”
18”
20”
24”
30”
36”
4
4
4
4
4
4
4
4
8
8
8
8
8
12
12
12
16
16
20
20
28
32
1/ 2”
1/ 2”
1/ 2”
1/ 2”
1/ 2”
5/ 8”
5/ 8”
5/ 8”
5/ 8”
5/ 8”
3/ 4”
3/ 4”
3/ 4”
7/ 8”
7/ 8”
1”
1”
1 1/8”
1 1/8”
1 1/4”
1 1/4”
1 1/2”
65
65
70
70
75
85
90
95
95
95
100
100
110
120
120
135
140
150
160
180
190
215
2 1/ 2”
2 1/ 2”
2 3/ 4”
2 3/ 4”
3”
3 1/ 4”
3 1/2”
3 3/4”
3 3/4”
3 3/4”
4”
4”
4 1/4”
4 3/4”
4 3/4”
5 1/4”
5 1/2”
6”
6 1/4”
7”
7 1/2”
8 1/2”
QuantitySize
inches mm inches
Length (For Flange RF Type)
STUDBOLTS REQUIRED
NPSDN
Flange Nominal Size
24
DN 750, 900 TO BS 3293 DIN15 TO 600 CONFORM TO ANSI B16.5
(Pn50) (Class 300)
NOTE:-
1.
2.
3.
4.
Imperial lengths are an approximate conversion.
Face height of 2mm is included in stud length for RF type flange.
Stud bolt length does not include points (refer to how to measure).
Stud bolt lengths are rounded to nearest 5mm.
Studbolt Sizes For Flanges
QuantitySize
inches mm inches
Length (For Flange RF Type)
STUDBOLTS REQUIRED
NPSDN
Flange Nominal Size
1/ 2”
5/8”
5/8”
5/8”
3/4”
5/ 8”
3/4”
3/4”
3/4”
3/4”
3/ 4”
3/ 4”
7/8”
1”
1 1/8”
1 1/8”
1 1/4”
1 1/4”
1 1/4”
1 1/2”
1 3/4”
2”
2 1/ 2”
3”
3 1/ 4”
3 1/4”
3 1/2”
3 1/2”
4”
4 1/4”
4 1/4”
4 1/4”
4 3/4”
5
5 1/2”
6 1/4”
6 6/4”
7”
7 1/2”
7 3/4”
8 1/4”
9
11 1/2”
12 3/4”
65
75
80
80
90
90
100
110
110
110
120
125
140
160
170
180
190
195
210
230
290
325
4
4
4
4
4
4
4
4
8
8
8
8
8
12
12
12
16
16
20
20
28
32
1/ 2”
3/4”
1”
1 1/4”
1 1/2”
2”
2 1/2”
3”
3 1/2”
4”
5”
6”
8”
10”
12”
14”
16”
18”
20”
24”
30”
36”
15
20
25
32
40
50
65
80
90
100
125
150
200
250
300
350
400
450
500
600
750
900
Unbrako®
25
Studbolt Sizes For Flanges
NOTE
1.
2.
3.
4.
Imperial lengths are an approximate conversion.
Face height of 2mm is included in stud length for RF type flange.
Stud bolt length does not include points (refer to how to measure).
Stud bolt lengths are rounded to nearest 5mm.
DN 750, 900 TO BS 3293 DIN15 TO 600 CONFORM TO ANSI B16.5
(Pn100) (Class 600)
1/2”
5/8”
5/8”
5/8”
3/4”
5/8”
3/4”
3/4”
7/8”
7/8”
1”
1”
1 1/8”
1 1/4”
1 1/4”
1 3/8”
1 1/2”
1 5/8”
1 5/8”
1 7/8”
2”
2 1/2”
3 1/4”
3 1/2”
3 1/2”
4”
4 1/4”
4 1/4”
4 3/4”
5
5 1/2”
5 3/4”
6 1/2”
6 3/4”
7 3/4”
8 ½”
8 3/4”
9 1/4”
10”
10 3/4”
11 1/2”
13”
14”
15 3/4”
80
90
90
100
110
110
120
125
140
145
165
170
195
215
220
235
355
275
290
330
355
400
4
4
4
4
8
8
8
8
8
8
12
12
16
20
20
20
20
24
24
28
28
41/ 2”
3/4”
1”
1 1/4”
1 1/2”
2”
2 1/2”
3”
3 1/2”
4”
5”
6”
8”
10”
12”
14”
16”
18”
20”
24”
30”
36”
15
20
25
32
40
50
65
80
90
100
125
150
200
250
300
350
400
450
500
600
750
900
QuantitySize
inches mm inches
Length (For Flange RF Type)
STUDBOLTS REQUIRED
NPSDN
Flange Nominal Size
26
DN 750, 900 TO BS 3293 DIN15 TO 600 CONFORM TO ANSI B16.5
(Pn150) (Class 900)
NOTE:-
1. Imperial lengths are an approximate conversion.
2. Face height of 2mm is included in stud length for RF type flange.
3. Stud bolt length does not include points (refer to how to measure).
4. Stud bolt lengths are rounded to nearest 5mm.
1.
2.
3.
4.
Imperial lengths are an approximate conversion.
Face height of 2mm is included in stud length for RF type flange.
Stud bolt length does not include points (refer to how to measure).
Stud bolt lengths are rounded to nearest 5mm.
Studbolt Sizes For Flanges
3/4”
3/4”
7/8”
7/8”
1”
7/8”
1”
7/8”
1 1/8”
1 1/4”
1 1/8”
1 3/8”
1 3/8”
1 3/8”
1 1/2”
1 5/8”
1 7/8”
2”
2 1/2”
4 1/4”
4 1/2”
5”
5”
5 1/2”
5 3/4”
6 1/4”
5 3/4”
6 3/4”
7 1/2”
7 3/4”
8 3/4”
9 1/4”
10”
10 3/4”
11 1/2”
12 3/4”
13 1/2”
17 1/4”
110
115
125
125
140
145
160
145
170
190
195
220
235
255
275
290
325
345
440
4
4
4
4
4
8
8
8
8
8
12
12
16
20
20
20
20
20
20
1/ 2”
3/4”
1”
1 1/4”
1 1/2”
2”
2 1/2”
3”
4”
5”
6”
8”
10”
12”
14”
16”
18”
20”
24”
15
20
25
32
40
50
65
80
100
125
150
200
250
300
350
400
450
500
600
QuantitySize
inches mm inches
Length (For Flange RF Type)
STUDBOLTS REQUIRED
NPSDN
Flange Nominal Size
Unbrako®
27
Studbolt Sizes For Flanges
NOTE
1.
2.
3.
4.
Imperial lengths are an approximate conversion.
Face height of 2mm is included in stud length for RF type flange.
Stud bolt length does not include points (refer to how to measure).
Stud bolt lengths are rounded to nearest 5mm.
CONFORM TO ANSI B16.5 DIN 15 TO 600
(PN250) (Class 1500)
3/4”
3/4”
7/8”
7/8”
1”
7/8”
1”
7/8”
1 1/8”
1 1/4”
1 1/8”
1 3/8”
1 3/8”
1 3/8”
1 ½”
1 5/8”
1 7/8”
2”
2 1/2”
4 1/4”
4 1/2”
5”
5”
5 1/2”
5 3/4”
6 1/4”
7”
7 3/4”
9 3/4”
10 1/4”
11 1/2”
13 1/4”
14 3/4”
16”
17 1/2”
19 ½”
21 1/2”
24 1/4”
110
115
125
125
140
145
160
180
195
250
260
290
335
375
405
445
495
545
615
4
4
4
4
4
8
8
8
8
8
12
12
12
16
16
16
16
16
16
1/ 2”
3/4”
1”
1 1/4”
1 1/2”
2”
2 1/2”
3”
4”
5”
6”
8”
10”
12”
14”
16”
18”
20”
24”
15
20
25
32
40
50
65
80
100
125
150
200
250
300
350
400
450
500
600
QuantitySize
inches mm inches
Length (For Flange RF Type)
STUDBOLTS REQUIRED
NPSDN
Flange Nominal Size
28
NOTE:-
1.
2.
3.
4.
Imperial lengths are an approximate conversion.
Face height of 2mm is included in stud length for RF type flange.
Stud bolt length does not include points (refer to how to measure).
Stud bolt lengths are rounded to nearest 5mm.
Studbolt Sizes For Flanges
DIN 15 TO 300 COMPLIES TO ANSI B16.5
(PN420) (Class 2500)
3/4”
3/4”
7/8”
1”
1 1/8”
1”
1 1/8”
1 1/4”
1 1/2”
1 3/4”
2”
2”
2 1/2”
2 3/4”
5”
5”
5 1/2”
6
6 3/4”
7
7 3/4
8 3/4
10”
11 3/4”
13 3/4”
15”
19”
21 1/2”
125
125
140
150
170
180
195
220
255
300
350
380
485
545
4
4
4
4
4
8
8
8
8
8
8
12
12
12
1/2"
3/4”
1”
1 1/4”
1 1/2”
2”
2 1/2"
3”
4”
5”
6”
8”
10”
12”
15
20
25
32
40
50
65
80
100
125
150
200
250
300
QuantitySize
inches mm inches
Length (For Flange RF Type)
STUDBOLTS REQUIRED
NPSDN
Flange Nominal Size
Unbrako®
29
Product Weight
Totally Threaded With 2 Heavy Hexagonal Nuts
2”
2.1/4”
2.1/2”
2.3/4”
3”
3.1/4”
3.1/2”
3.3/4”
4”
4.1/4”
4.1/2”
4.3/4”
5”
5.1/4”
5.1/2”
5.3/4”
6”
6.1/4”
6.1/2”
6.3/4”
7”
7.1/4”
7.1/2”
7.3/4”
8”
8.1/4”
8.1/2”
8.3/4”
9”
9.1/4”
9.1/2”
9.3/4”
10”
10.1/4”
10.1/2”
10.3/4”
50
60
65
70
75
80
90
95
100
110
115
120
125
130
140
145
150
160
165
170
180
185
190
195
200
210
215
220
230
235
240
250
255
260
265
275
0.054
0.056
0.061
0.063
0.065
0.069
0.071
0.074
0.076
0.080
0.082
0.084
0.086
0.091
0.093
0.095
0.097
0.102
0.104
0.106
0.110
0.112
0.114
0.117
0.121
0.123
0.125
0.127
0.132
0.134
0.136
0.140
0.142
0.145
0.147
0.151
0.073
0.076
0.082
0.085
0.087
0.093
0.096
0.099
0.102
0.108
0.111
0.114
0.117
0.123
0.126
0.128
0.131
0.137
0.140
0.143
0.149
0.152
0.155
0.158
0.164
0.167
0.169
0.172
0.178
0.181
0.184
0.19
0.193
0.196
0.199
0.205
0.108
0.113
0.121
0.125
0.129
0.137
0.141
0.145
0.149
0.157
0.161
0.165
0.169
0.177
0.181
0.185
0.189
0.197
0.201
0.205
0.213
0.217
0.221
0.225
0.233
0.237
0.241
0.245
0.253
0.257
0.261
0.269
0.274
0.278
0.282
0.290
0.135
0.140
0.150
0.155
0.160
0.170
0.174
0.179
0.184
0.194
0.199
0.204
0.209
0.219
0.224
0.229
0.234
0.244
0.249
0.254
0.264
0.269
0.224
0.279
0.289
0.294
0.299
0.304
0.314
0.319
0.324
0.334
0.339
0.344
0.349
0.359
0.172
0.178
0.191
0.197
0.203
0.216
0.122
0.229
0.235
0.248
0.254
0.261
0.267
0.28
0.286
0.292
0.299
0.311
0.318
0.324
0.337
0.343
0.349
0.356
0.369
0.375
0.381
0.388
0.400
0.407
0.413
0.426
0.432
0.438
0.445
0.457
0.279
0.289
0.307
0.317
0.326
0.345
0.354
0.363
0.373
0.391
0.401
0.410
0.420
0.438
0.448
0.457
0.466
0.485
0.494
0.504
0.522
0.532
0.541
0.550
0.569
0.578
0.588
0.597
0.616
0.625
0.635
0.653
0.663
0.672
0.681
0.700
0.400
0.413
0.438
0.451
0.464
0.489
0.502
0.515
0.528
0.553
0.566
0.579
0.592
0.617
0.630
0.643
0.656
0.681
0.694
0.707
0.733
0.745
0.758
0.771
0.797
0.809
0.822
0.835
0.861
0.873
0.886
0.912
0.925
0.937
0.950
0.976
0.554
0.571
0.604
0.621
0.638
0.671
0.688
0.705
0.722
0.755
0.772
0.789
0.806
0.839
0.856
0.870
0.890
0.923
0.940
0.957
0.991
1.007
1.024
1.041
1.075
1.091
1.108
1.125
1.159
1.175
1.192
1.226
1.243
1.259
1.276
1.310
0.747
0.768
0.812
0.833
0.855
0.898
0.920
0.940
0.963
1.006
1.028
1.050
1.071
1.115
1.136
1.158
1.180
1.223
1.245
1.266
1.309
1.331
1.353
1.374
1.418
1.439
1.461
1.483
1.526
1.548
1.569
1.613
1.634
1.656
1.678
1.221
0.960
0.988
1.042
1.069
1.096
1.151
1.178
1.205
1.232
1.286
1.313
1.341
1.368
1.422
1.449
1.476
1.503
1.558
1.585
1.612
1.666
1.694
1.721
1.748
1.802
1.829
1.856
1.884
1.938
1.965
1.992
2.045
2.074
2.101
2.128
2.182
1.229
1.263
1.329
1.362
1.396
1.462
1.495
1.529
1.562
1.628
1.662
1.695
1.728
1.795
1.828
1.861
1.894
1.961
1.994
2.027
2.094
2.127
2.160
2.194
2.260
2.293
2.327
2.360
2.426
2.460
2.493
2.559
2.593
2.626
2.659
2.726
1.543
1.583
1.663
1.703
1.743
1.823
1.863
1.903
1.943
2.023
2.063
2.103
2.143
2.231
2.263
2.304
2.344
2.424
2.464
2.504
2.584
2.624
2.664
2.704
2.784
2.824
2.864
2.904
2.984
3.024
3.064
3.145
3.185
3.225
3.265
3.345
1.950
1.997
2.092
2.139
2.187
2.282
2.329
2.376
2.424
2.519
2.566
2.613
2.661
2.756
2.803
2.850
2.898
2.993
3.040
3.087
3.182
3.230
3.277
3.324
3.419
3.467
3.514
3.561
3.656
3.704
3.751
3.846
3.893
3.941
3.988
4.083
2.333
2.389
2.500
2.555
2.611
2.722
2.777
2.833
2.888
2.999
3.055
3.110
3.166
3.277
3.330
3.388
3.443
3.554
3.610
3.665
3.776
3.832
3.887
3.943
4.054
4.109
4.165
4.220
4.331
4.387
4.442
4.553
4.609
4.664
4.720
4.831
3/8” 7/16” 1/ 2” 9/16” 5/8” 3/4” 7/8” 1” 1.1/8” 1.1/4” 1.3/8” 1.1/2” 1.5/8” 1.3/4”Length
DiaWEIGHT (kg) FOR 1 PIECE
30
Product Weight
Totally Threaded With 2 Heavy Hexagonal Nuts
11”
11.1/4”
11.1/2”
11.3/4”
12”
12.1/4”
12.1/2”
12.3/4”
13”
13.1/4”
13.1/2”
13.3/4”
14”
14.1/4”
14.1/2”
14.3/4”
15”
15.1/4”
15.1/2”
15.3/4”
16”
16.1/4”
16.1/2”
16.3/4”
17”
17.1/4”
17.1/2”
17.3/4”
18”
18.1/4”
18.1/2”
18.3/4”
19”
19.1/4”
19.1/2”
19 3/4”
280
285
290
300
305
310
320
325
330
335
345
350
355
360
370
375
380
385
395
400
405
415
420
425
430
440
445
450
455
465
470
475
485
490
495
500
0.153
0.155
0.158
0.162
0.164
0.166
0.168
0.173
0.175
0.177
0.181
0.183
0.186
0.188
0.192
0.194
0.196
0.199
0.203
0.205
0.207
0.209
0.214
0.216
0.218
0.222
0.224
0.227
0.229
0.233
0.235
0.237
0.242
0.244
0.246
0.248
4.886
4.942
4.997
5.108
5.164
5.219
5.275
5.386
5.441
5.497
5.608
5.663
5.719
5.774
5.886
5.940
5.996
6.052
6.163
6.218
6.274
6.329
6.440
6.496
6.551
6.662
6.718
6.773
6.829
6.940
6.995
7.051
7.162
7.217
7.273
7.328
0.208
0.210
0.213
0.219
0.222
0.225
0.228
0.234
0.237
0.240
0.246
0.249
0.251
0.254
0.260
0.263
0.266
0.269
0.275
0.278
0.281
0.284
0.290
0.292
0.295
0.301
0.304
0.307
0.310
0.316
0.319
0.322
0.328
0.331
0.333
0.336
0.294
0.298
0.302
0.310
0.314
0.318
0.322
0.330
0.334
0.338
0.346
0.350
0.354
0.358
0.366
0.370
0.374
0.378
0.386
0.390
0.394
0.398
0.406
0.410
0.414
0.422
0.426
0.430
0.435
0.443
0.447
0.451
0.459
0.463
0.467
0.471
0.364
0.369
0.374
0.384
0.389
0.394
0.399
0.409
0.414
0.419
0.429
0.434
0.439
0.444
0.454
0.459
0.464
0.469
0.479
0.483
0.488
0.493
0.503
0.508
0.513
0.523
0.528
0.533
0.538
0.548
0.553
0.558
0.568
0.573
0.578
0.583
0.464
0.470
0.476
0.489
0.496
0.502
0.508
0.521
0.527
0.534
0.546
0.553
0.559
0.565
0.578
0.584
0.591
0.597
0.610
0.616
0.623
0.629
0.642
0.648
0.654
0.667
0.673
0.680
0.686
0.699
0.705
0.711
0.724
0.730
0.737
0.743
0.709
0.719
0.728
0.747
0.756
0.765
0.775
0.794
0.803
0.812
0.831
0.840
0.850
0.859
0.878
0.887
0.896
0.906
0.924
0.934
0.943
0.952
0.971
0.981
0.990
1.009
1.018
1.027
1.037
1.055
1.065
1.074
1.093
1.102
1.111
1.127
0.989
1.001
1.014
1.040
1.053
1.065
1.078
1.104
1.117
1.129
1.155
1.168
1.181
1.193
1.219
1.232
1.245
1.257
1.283
1.296
1.309
1.327
1.347
1.360
1.373
1.398
1.411
1.424
1.437
1.462
1.475
1.488
1.513
1.526
1.539
1.552
1.327
1.343
1.360
1.394
1.411
1.427
1.461
1.478
1.495
1.511
1.545
1.562
1.579
1.595
1.629
1.646
1.663
1.679
1.713
1.730
1.747
1.763
1.797
1.814
1.831
1.864
1.881
1.898
1.915
1.948
1.965
1982
2.015
2.032
2.049
1.066
1.742
1.764
1.786
1.829
1.851
1.872
1.894
1.937
1.959
1.981
2.024
2.046
2.067
2.089
2.132
2.154
2.175
2.197
2.240
2.262
2.284
2.305
2.349
2.370
2.392
2.435
2.457
2.479
2.500
2.544
2.565
2.587
2.630
2.652
2.673
2.695
2.209
2.237
2.264
2.318
2.345
2.372
1.399
2.454
2.481
2.508
2.562
2.589
2.617
2.644
2.698
2.725
2.752
2.780
2.834
2.861
2.888
2.915
2.970
2.997
3.024
3.078
3.105
3.132
3.160
3.214
3.241
3.268
3.323
3.350
3.377
3.404
2.759
2.792
2.825
2.892
2.925
2.958
2.992
3.058
3.091
3.125
3.191
3.224
3.258
3.291
3.357
3.391
3.424
3.457
3.524
3.557
3.590
3.623
3.690
3.723
3.756
3.823
3.856
3.889
3.923
3.989
4.022
4.056
4.122
4.155
4.189
4.222
3.385
3.425
3.465
3.545
3.585
3.625
3.705
3.745
3.785
3.825
3.906
3.946
3.986
4.026
4.106
4.146
4.186
4.226
4.306
4.346
4.386
4.426
4.506
4.546
4.586
4.666
4.707
4.747
4.787
4.867
4.907
4.947
5.027
5.067
5.107
5.147
4.130
4.178
4.225
4.320
4.367
4.415
4.462
4.557
4.604
4.652
4.746
4.794
4.841
4.889
4.983
5.031
5.078
5.126
5.220
5.268
5.315
5.363
5.457
5.505
5.552
5.647
5.694
5.742
5.789
5.884
5.931
5.979
6.074
6.121
6.168
6.216
3/8” 7/16” 1/ 2” 9/16” 5/8” 3/4” 7/8” 1” 1.1/8” 1.1/4” 1.3/8” 1.1/2” 1.5/8” 1.3/4”Length
DiaWEIGHT (kg) FOR 1 PIECE
Unbrako®
31
Product Weight
2.830
2.894
3.022
3.086
3.150
3.278
3.342
3.406
3.470
3.598
3.662
3.716
3.790
3.918
3.982
4.046
4.110
4.238
4.302
4.366
4.430
4.494
4.558
4.622
4.685
4.814
4.878
4.942
5.006
5.134
5.198
5.262
5.390
5.454
5.518
5.582
5.710
3.394
3.467
3.613
3.686
3.759
3.905
3.978
4.051
4.124
4.270
4.343
4.416
4.489
4.635
4.708
4.781
4.854
5.073
5.146
5.219
5.292
5.365
5.438
5.511
5.584
5.730
5.803
5.803
5.876
6.022
6.095
6.168
6.314
6.387
6.460
6.533
6.679
4.667
4.761
4.948
5.041
5.135
5.322
5.415
5.509
5.602
5.789
5.883
5.976
6.070
6.257
6.350
6.444
6.537
6.724
6.818
6.911
7.005
7.098
7.192
7.285
7.379
7.566
7.639
7.753
7.846
8.033
8.127
8.220
8.407
8.501
8.594
8.688
8.875
6.282
6.398
6.631
6.748
6.864
7.097
7.214
7.330
7.447
7.680
7.796
7.913
8.029
8.262
8.379
8.495
8.612
8.845
8.961
9.078
9.194
9.311
9.427
9.544
9.660
9.893
10.010
10.126
10.246
10.476
10.592
10.709
10.942
11.058
11.175
11.291
11.524
7.953
8.094
8.377
8.519
8.660
8.943
9.085
9.226
9.368
9.651
9.792
9.934
10.075
10.358
10.500
10.641
10.783
11.066
11.207
11.349
11.490
11.632
11.773
11.915
12.056
12.339
12.481
12.622
12.764
13.047
13.188
13.330
13.613
13.754
13.896
14.037
14.320
9.769
9.938
10.277
10.447
10.616
10.955
11.125
11.294
11.464
11.803
11.972
12.142
12.311
12.650
12.820
12.989
13.159
13.498
13.667
13.837
14.006
14.176
14.345
14.515
14.684
15.023
15.193
15.362
15.532
15.871
16.040
16.210
16.549
16.718
16.888
17.057
17.396
11.970
12.173
12.578
12.780
12.983
13.388
13.590
13.793
13.995
14.400
14.603
14.805
15.008
15.413
15.615
15.818
16.020
16.425
16.628
16.830
17.033
17.235
17.438
17.640
17.843
18.048
18.450
18.653
18.855
19.260
19.463
19.665
20.070
20.273
20.475
20.678
21.083
15.499
15.735
16.207
16.443
16.679
17.151
17.387
17.623
17.859
18.331
18.567
18.803
19.039
19.511
19.747
19.983
20.219
20.691
20.927
21.163
21.399
21.635
21.871
22.107
22.343
22.815
23.051
23.287
23.523
23.995
24.231
24.467
24.939
25.175
25.411
25.647
26.119
18.579
18.844
19.374
19.639
19.904
20.434
20.699
20.964
21.229
71.759
22.024
22.289
22.554
23.084
23.349
23.614
23.879
24.409
24.674
24.939
25.204
25.469
25.734
25.999
26.264
26.794
27.059
27.324
27.589
28.119
28.384
28.649
29.179
29.444
29.709
29.974
30.504
22.948
23.253
23.862
24.166
24.470
25.079
25.384
25.688
25.992
26.601
26.906
27.210
27.514
28.123
28.428
28.732
29.036
29.645
29.950
30.254
30.558
30.863
31.167
31.472
31.776
32.385
32.689
32.994
33.298
33.907
34.211
34.516
35.124
35.429
35.733
36.038
36.646
WEIGHT (kg) FOR 1 PIECE
Length
Dia
1.7/8” 2” 2.1/4” 2.1/2” 2.3/4” 3” 3.1/4” 3.1/2” 3.3/4” 4”
50
60
65
70
75
80
90
95
100
110
115
120
125
130
140
145
150
160
165
170
175
180
185
190
195
200
210
215
220
230
235
240
250
255
260
265
275
2”
2.1/4”
2.1/2”
2.3/4”
3”
3.1/4”
3.1/2”
3.3/4”
4”
4.1/4”
4.1/2”
4.3/4”
5”
5.1/4”
5.1/2”
5.3/4”
6”
6.1/4”
6.1/2”
6.3/4”
6.7/8”
7”
7.1/4”
7.1/2”
7.3/4”
8”
8.1/4”
8.1/2”
8.3/4”
9”
9.1/4”
9.1/2”
9.3/4”
10”
10.1/4”
10.1/2”
10.3/4”
Totally Threaded With 2 Heavy Hexagonal Nuts
32
Product Weight
280
285
290
295
300
305
310
315
320
325
330
335
340
345
350
355
360
365
370
375
380
385
390
395
400
405
410
415
420
425
430
435
440
445
450
455
460
465
470
475
480
485
490
495
500
11''
11.1/4"
11.1/2"
11.5/8"
11.3/4"
12"
12.1/4"
12.1/2"
12.5/8"
12.3/4"
13"
13.1/4"
13.3/8"
13.1/2"
13.3/4"
14"
14.1/4"
14.3/8"
14.1/2"
14.3/4"
15"
15.1/4"
15.3/8"
15.1/2"
15.3/4"
16"
16.1/4"
16.3/8"
16.1/2"
16.3/4"
17"
17.1/8"
17.1/4"
17.1/2"
17.3/4"
18"
18.1/8"
18.1/4"
18.1/2"
18.3/4"
18.7/8"
19"
19.1/4"
19.1/2"
19.3/4"
5.774
5.838
5.902
5.966
6.030
6.094
6.158
6.222
6.286
6.350
6.414
6.478
6.542
6.606
6.670
6.734
6.798
6.862
6.926
6.990
7.054
7.118
7.182
7.246
7.310
7.374
7.438
7.502
7.566
7.630
7.694
7.758
7.822
7.886
7.950
8.014
8.078
8.142
8.206
8.270
8.334
8.398
8.462
8.526
8.590
6.752
6.825
6.898
6.971
7.044
7.117
7.190
7.263
7.336
7.409
7.482
7.555
7.628
7.701
7.774
7.847
7.920
7.993
8.066
8.139
8.212
8.285
8.358
8.431
8.504
8.577
8.650
8.723
8.796
8.869
8.942
9.015
9.088
9.161
9.234
9.307
9.380
9.453
9.526
9.599
9.672
9.745
9.818
9.891
9.964
8.968
9.062
9.155
9.249
9.342
9.436
9.529
9.623
9.716
9.810
9.903
9.997
10.090
10.184
10.277
10.371
10.464
10.558
10.651
10.745
10.838
10.932
10.025
11.119
11.212
11.306
11.399
11.493
11.586
11.680
11.773
11.867
11.960
12.054
12.147
12.241
12.334
12.428
12.521
12.615
12.708
12.802
12.895
12.989
13.082
11.641
11.757
11.874
11.990
12.107
12.223
12.340
12.456
12.573
12.689
12.806
12.922
13.039
13.155
13.272
13.388
13.505
13.621
13.738
13.854
13.971
14.087
14.204
14.320
14.437
14.553
14.670
14.786
14.903
15.019
15.136
15.252
15.369
15.485
15.602
15.718
15.835
15.951
16.068
16.184
16.301
16.417
16.534
16.650
16.767
14.462
14.603
14.745
14.886
15.028
15.169
15.311
15.452
15.594
15.735
15.877
16.018
16.160
16.301
16.443
16.584
16.726
16.867
17.009
17.150
17.292
17.433
17.575
17.716
17.858
17.999
18.141
18.282
18.424
18.565
18.707
18.848
18.990
19.131
19.273
19.414
19.556
19.697
19.839
19.980
20.122
20.263
20.405
20.546
20.688
17.566
17.735
17.905
18.074
18.244
18.413
18.583
18.752
18.922
19.091
19.261
19.430
19.600
19.769
19.939
20.108
20.278
20.447
20.617
20.786
20.956
21.125
21.295
21.464
21.634
21.803
21.973
22.142
22.312
22.481
22.651
22.820
22.990
23.159
23.329
23.498
23.668
23.837
24.007
24.176
24.346
24.515
24.685
24.854
25.024
21.285
21.488
21.690
21.893
22.095
22.298
22.500
22.703
22.905
23.108
23.310
23.513
23.715
23.918
24.120
24.323
24.525
24.728
24.930
25.133
25.535
25.538
25.740
25.943
26.145
26.348
26.550
26.753
26.955
27.158
27.360
27.563
27.765
27.968
28.170
28.373
28.575
28.778
28.980
29.183
29.385
29.588
29.790
29.993
30.195
26.355
26.591
26.827
27.063
27.299
27.535
27.771
28.007
28.243
28.479
28.715
28.951
29.187
29.423
29.659
29.895
30.131
30.367
30.603
30.838
31.075
31.311
31.547
31.783
32.019
32.255
32.491
32.727
32.963
33.199
33.435
33.671
33.907
34.143
34.379
34.615
34.851
35.087
35.323
35.559
35.795
36.031
36.267
36.503
36.739
30.769
31.034
31.299
31.564
31.829
32.094
32.359
32.624
32.889
33.154
33.419
33.684
33.949
34.214
34.479
34.744
35.009
35.274
35.539
35.804
36.069
36.334
36.599
36.864
37.129
37.394
37.659
37.924
38.189
38.454
38.719
38.984
39.249
39.514
39.779
40.044
40.309
40.574
40.839
41.104
41.369
41.634
41.899
42.164
42.429
36.951
37.255
37.560
37.864
38.168
38.473
38.777
39.082
39.386
39.690
39.995
40.299
40.604
40.908
41.212
41.517
41.821
42.126
41.430
42.734
43.039
43.343
43.648
43.952
44.256
44.561
44.865
45.170
45.474
45.778
46.083
46.387
46.692
46.996
47.300
47.605
47.909
48.214
48.518
48.822
49.127
49.431
49.736
50.040
50.344
WEIGHT (kg) FOR 1 PIECE
Length
Dia
1.7/8” 2” 2.1/4” 2.1/2” 2.3/4” 3” 3.1/4” 3.1/2” 3.3/4” 4”
Totally Threaded With 2 Heavy Hexagonal Nuts
Unbrako®
33
website: www.unbrako.com / e-mail: unbrakosales@unbrako.com
ORLD IDE Access
BSI
0045
BSI
ISO/TS 16949:2002ISO 9001:2000
Engineered for Engineers
Unbrako®