structural_guide

Unit 15, Darton Business Park, Darton, Barnsley, South Yorkshire, UK S75 5NQ

Tel: +44 (0)1226 383824, Fax: +44 (0)1226 390004, Web: www.bapp.co.uk

BAPPG r o u p o f C o m p a n i e s

Stockists of Industrial Fasteners,

Engineering Supplies and

Health and Safety Products

Branch Locations:• Barnsley

• Brighouse

• Castleford

• Doncaster

• Hull

• Kirkby-in-Ashfield

• Loughborough

• Preston

• Rochdale

• Scunthorpe


Structural Bolting Guidewww.bapp.co.uk

Intro

Introduction

The BAPP Group of Companies founded in 1972 has now

become the largest independent stockist and distributor of

industrial fasteners and associated products in the UK.

The BAPP branch network covers total supply throughout the

UK from our twelve locations. As well as same and next day

delivery to our OEM customer base, each branch has it’s own

Tool and Fixing centre.

The BAPP Export Division located at group head office

has vast experience in shipping throughout the world

and can cater to any demands for both major and small

construction projects.

Tel: +44 (0)1226 383824, Fax: +44 (0)1226 390004

Web: www.bapp.co.uk

Contents

Contents

Technical: +44 (0)1226 383824


Page Description

1 Hexagon Head Bolts - DIN 931/933

2 Hexagon Nuts - DIN 934

3 Holding Down Bolts - B.S. 7914 Bolt Boxes

4 Bolt Extenders Plate Washers (S275)

5 High Strength Friction Grip Bolt B.S. 4395 PT 1&2

6 High Strength Friction Grip Nut B.S. 4395 PT 1&2

7 DTI Washers B.S. 7644 PT1/F959M Hardened Washers B.S. 4395 PT1

8 DIN 6914 Bolts DIN 6915 Nuts DIN 6916 Washers

Page Description

9 ASTM A325M Bolts ASTM A490M Bolts 10 ASTM A563M Nuts ASTM F436M Washers

11 Tension Control Bolts JSSII09 S10T

12 Tension Control Nuts JSSII09 F10 Tension Control Washers JSSII09 F35

13 Machining Tie Rods, Allthread

14 Flat Round Washers

15 Corrosion Coatings For Bolt Protection

16 BAPP Group Test Certificate


1

Hexagon Head Bolt

Dimensions

Page 1

Standard Specification: BS 3692, DIN 931/933 Conforms to ISO4014, ISO4017 Material: High Tensile Steel Strength Grade: 8.8, 10.9 Screw Thread: 6g of ISO 965/2 Surface Finish: Black, Electro Galvanized, Hot Dipped Galvanized Sherardised

D1(Max)

DW(Min)

A(Apporx)

F(Max)

H(Approx)

L<125 L>125

M12 12 17.6 21.9 19 7.5 30 36

M14 14 20.4 25.4 22 8.8 34 40

M16 16 22.3 27.7 24 10.0 38 44

M18 18 25.6 31.2 27 11.5 42 48

M20 20 28.5 34.6 30 12.5 46 52

M22 22 30.4 37 32 14 50 56

M24 24 34.2 41.6 36 15 54 60

M27 27 38.0 47.3 41 17 60 66

M30 30 42.7 53.1 46 18.7 66 72

M33 33 46.5 57.8 50 21 72 78

M36 36 50.1 63.5 55 22.5 78 84

M39 39 53.9 69.3 60 25 84 90

M42 42 57.7 75 65 26 90 96

M45 45 61.50 80.8 70 28 96 102

MechanicalProperty

Property Class

3.6 4.6 4.8 5.6 5.8 6.88.8 8.8

9.8 3) 10.9 12.9d<16mm d>15mm2)

12

Tensile strengthRM

4) N/mm2

nom. 300 400 500 600 800 800 900 1000 1200

min. 330 400 420 500 520 600 800 830 900 1040 1220

3 Vickers hardnessHV F 98N

min. 95 120 130 155 160 190 250 255 290 320 385

max. 250 320 335 360 380 435

4 Brinell hardnessHB 7 = 30 D2

min. 90 114 124 147 152 181 238 242 276 304 366

max. 238 304 318 342 361 414

5Rockwell hardness

HR

min.HRB 52 67 71 79 82 89

HRC 22 23 28 32 39

max.HRB 99.5

HRC 32 34 37 39 44

6 Surface hardnessHV 0,3 max. 5)

7 Lower yield stressRel 6) Nmm2

nom. 180 240 320 300 400 480

min. 190 240 340 300 420 480

8 Proof stressRp 0,2 N/mm2

nom. 640 640 720 900 1080

min. 640 660 720 940 1100

9

Stress under proofing

Sp/Relor

Sp/Rp 0,20,94 0,94 0,91 0,93 0,90 0,92 0,91 0,91 0,90 0,88 0,88

Load, Sp N/mm2 180 225 310 280 380 440 580 600 650 830 970

10 Elongation after fracture A in % min. 25 22 14 20 10 8 12 12 10 9 8

11 Strength under wedge loading The values for full size bolts and screws (not studs) shall not be smallerthan the minimum values for tensile strength shown in 5.2

12 Impact strength, J min. 25 30 30 25 20 15

13 Head soundness No fracure

14

Minimum height of non-decarburized

thread zone, E

1/2H12/3H1

3/4H1

Maximum depthof complete

decarurization, G0,015

Mechanical Properties of bolts, screws and studs

+20oC +100oC +200oC +250oC +300oC

Property class Lower yield stress Rel or proof stress Rp0,2 N/mm2

5.6 300 270 230 215 195

8.8 640 590 540 510 480

10.9 940 875 790 745 705

12.9 1100 1020 925 875 825

Designation system of property classesThe property class symbols, indicating the most important mechanical properties, consist of two figures, one on either side of a dot.For example,10.9. The first figure indicates 1/100 of the nominal tensile strength in N/mm2 (see Rm in the table). So property class 10.9 has a tensile strength of 10 x 100 = 1000 N/mm2. The second figure indicates 10 times the ratio between lower yield stress Rel (or proof stress Rp0,2) and nominal tensile strength Rm (yield stress ratio). So at property class 10.9 the second figure 9 = 10 x The multiplication of these two figures will give 1/10 of the yield stress in N/MM2, SO 10 X 9 = 1/10 X 900 N/mm2.

9001000

dw1d

30o

45o

H LF

A

T

BG

M 8.8


2Page 2

Hexagon Nut - Metric Coarse

Standard Specification: DIN 934 Also conforms to BS 3692 Material: Medium Carbon Steel Material Properties: Cl 8, 10 as per ISO 898/2 Threads: Conforms to Class 6H of ISO 965/2 for coarse series Surface Finish: Black, Electro Galvanized, Hot Dipped Galvanized Sherardised

AF

AC

D

B

8


Pitch AF AC D

M12 1.75 19.0 21.10 10.00

M14 2.0 22.0 24.49 11.00

M16 2.0 24.0 26.75 13.00

M18 2.5 27.0 29.56 15.00

M20 2.5 30.0 32.95 16.00

M22 2.5 32.0 35.72 18.00

M24 3.0 36.0 39.55 19.00

M27 3.0 41.0 45.20 22.00

M30 3.5 46.0 50.85 24.00

M33 3.5 50.0 55.37 26.00

M36 4.0 55.0 60.79 29.00

M39 4.0 60.0 66.44 31.00

M42 4.5 65.0 72.09 34.00

M45 4.5 70.0 80.85 36.00

Dimensions

Mechanical properties of nuts with metric (ISO) thread with coarse pitch

Nominal size(thread

diameter mm)

Property class

04 05 4 5

Proofstress

Sp

Vickershardness

HV

Rockwellhardness

HRC

Proofstress

Sp

Vickershardness

HV

Rockwellhardness

HRC

Proofstress

Sp

Vickershardness

HV

Rockwellhardness

HRC

Proofstress

Sp

Vickershardness

HV

Rockwellhardness

HRC

N/mm2 min max min max N/mm2 min max min max N/mm2 min max min max N/mm2 min max min max

over to

4

380188 302 30

500272 353 27,8 36

520

130

302 30

4 7 580

7 10 590

10 16 610

16 39 510117 302 30

630 146

39 100 128

Nominal size(thread

diameter mm)

Property class

6 8 9 10 12

Proofstress

Sp

Vickershardness HV

Rockwellhardness

HRC

Proofstress

Sp

Vickershardness HV

Rockwellhardness

HRC

Proofstress

Sp

Vickershardness HV

Rockwellhardness

HRC

Proofstress

Sp

Vickershardness HV

Rockwellhardness

HRC

Proofstress

Sp

Vickershardness HV

Rockwellhardness HRC

N/mm2 min max min max N/mm2 min max min max N/mm2 min max min max N/mm2 min max min max N/mm2 min max min max

over to

4 600

150

302 30

800 170

302 30

900 170

302 30

1040

272 353 28 38

1150

2951)

2722) 353311)

282) 38

4 7 670 810

188

915

188

1040 1150

7 10 680 830 940 1040 1160

10 16 700 840 950 1050 1190

16 39 720 170 920 233353 38

920 1060 1200

39 100 142 207

Minimum hardness is mandatory only for heat-treated nuts and nuts too large to be proof-load tested. For all other nuts minimum hardness is provided for guidance only. Hardness values for nominal sizes over 39 up to and including 100mm are to be used for guidance only.

1) for nuts ISO 4032 (type 1), 2) for nuts ISO 4033 (type 2)

Technical: +44 (0)1226 383824


3

SQ. SQ. Holding Down Bolts

B.S. 7419 Grades 4.6 & 8.8

Page 3

A

T

L

HS

AF

SQ


ANominalDiameter

TThreadLength

mm

AFWidth

Across Flats mm

SQUnderheadWidth AF

mm

HThickness

of SQ. Head mm

SUnderheadThickness

mm

M12 112 19 12 8 6

M16 116 24 16 10 8

M20 120 30 20 12.5 10

M22 122 32 22 14 12

M24 124 36 24 15 12

M27 127 41 27 17 15

M30 130 46 30 18.7 15

M33 133 50 33 21 18

M36 136 55 36 22.5 18

M39 139 60 39 25 21

M42 142 65 42 26 21

M45 145 70 45 28 24

M48 148 75 48 30 24

Conical Bolt Boxed

Material: Waxed Cardboard

A simple method of bolt alignment

for steel frame buildings. Standard Specification: BS 7419 Material: Carbon & High Tensile Steel Material Properties: 4, 6, 8.8 Screw Thread: 6g of ISO 965/2 Surface Finish: Black, Hot Dipped Galvanized

4Page 4

RD

P

SQ

P

T

Washer plates are produced from mild steel plate (S275). All holes are

produced on a DIA + 2mm Tolerance on both square and round hole.

As well as singular holed plates, we can produce a range

of multiple holed plates to customer specification.

Washer Plates

Bolt Extenders

Bapp produce bolt extenders specifically for the structural engineering industry.

All bolt extenders are produced as Grade 8.8 (40cr mo4) as standard.

A

C

A

D


Technical: +44 (0)1226 383824


InternallyThreaded

DShank Diameter

mm

AWidth across flats

mm

CWidth across corners

mm

M16 24 36 41.6

M20 30 46 53.1

M22 33 50 57.8

M24 36 55 63.5

M27 42 65 69.3

M30 45 70 80.8

M36 52 80 92.4

5

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Nominal size and thread diameter

d mm

Pitch of thread (coarse pitch

series) p mm

Tensile stress area

(see Note 1) AS mm

Ultimate load (see NOTE 2) min.

Yield load or load permanent set at limit R0.2 min. (see NOTE 3) min.

Proof load (see NOTE 4) min. Elongation after fracture

Hardness (see NOTE 5)

Brinell HB Rockwell HRC Vickers HV 30

tonne-force (1000 kgf)

kilo-newtons


kilo-newtons


kilo-newtons percent min. max. min. max. min. max. min.

M12a 1.75 84.3 7.1 69.6 5.45 53.5 5.04 49.4 12 321 255 34 25 330 260

M16 2.0 157 13.25 130 10.16 99.7 9.39 92.1 12 321 255 34 25 330 260

M20 2.5 245 20.71 203 15.85 155 14.64 144 12 321 255 34 25 330 260

M22 2.5 303 25.57 250 19.60 192 18.1 177 12 321 255 34 25 330 260

M24 3.0 353 29.79 292 22.94 225 21.10 207 12 321 255 34 25 330 260

M27 3.0 459 33.89 333 26.04 259 23.88 234 12 295 223 30 19 292 225

M30 3.5 561 41.42 406 31.82 313 29.19 286 12 295 223 30 19 292 225

M36 4.0 817 60.32 591 46.35 445 42.51 418 12 295 223 30 19 292 225

NOTE 1: The tensile stress area is calculated from the following formula: As (mean of effective and minor diameters)2 = (effective diameter + minor diameter)2. NOTE 2: Based on 84.38 kgf/mm2 (827 N/mm2) for sizes M12 to M24 inclusive and 73.83 kgf/mm2 (725 N/mm2) for sizes M27 to M36 inclusive. NOTE 3: Based on 64.7 kgf/mm2 (635 N/mm2) for sizes M12 to M24 inclusive and 56.73 kgf/mm2 (558 N/mm2) for sizes M27 to M36 inclusive. Equivalent to stress at permanent set limit R0.2 min. NOTE 4: Based on 59.77 kgf/mm2 (587 N/mm2) for sizes M12 to M24 inclusive and 52.04 kgf/mm2 (512 N/mm2) for sizes M27 to M36 inclusive. NOTE 5: Hardness values are given for guidence only.

π4

π16

High Strength Friction Grip Bolt

HSFG 4395 PTI & PT2 Bolt - Dimensions of Hexagon Head Bolt

Page 5

S

e

BG

ISOM

109

S

e

BG

ISOM

4395 PT1 4395 PT2

Length

Rad. approx. 11/4 d

d

da df

d

30o

45o

Rad r

k Lengthc

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Nominal size and thread diameter d

Pitch of thread p

Diameter of unthreaded shank d

Width across flats s

Width across corners e

Diameter of washer facedf

Depth of washer face c

Radius under headr

Transition diameter da

Thickness of headk

(coarse pitch series) max. min. max. min. max. min. max. min. max. max. min. max. max. min.

M12a 1.75 12.70 11.30 22 21.16 25.4 23.70 22 19.91 0.4 1.00 0.6 14.7 8.45 7.55

M16 2.0 16.70 15.30 27 26.16 31.2 29.30 27 24.91 0.4 1.00 0.6 18.7 10.45 9.55

M20 2.5 20.84 19.16 32 31.00 36.9 35.03 32 29.75 0.4 1.2 0.8 23.24 13.90 12.10

M22 2.5 22.84 21.16 36 35.00 41.6 39.55 36 33.75 0.4 1.2 0.8 25.24 14.90 13.10

M24 3.0 24.84 23.16 41 40.00 47.3 45.20 41 38.75 0.5 1.2 0.8 27.24 15.90 14.10

M27 3.0 27.84 26.16 46 45.00 53.1 50.85 46 43.75 0.5 1.5 1.0 30.84 17.90 16.10

M30 3.5 30.84 29.16 50 49.00 57.7 55.37 50 47.75 0.5 1.5 1.0 33.84 20.05 17.95

M36 4.0 37.0 35.0 60 58.80 69.3 66.44 60 57.75 0.5 1.5 1.0 40.00 24.05 21.95

a Non-preferred. Only to be used for the lighter type of construction where practical conditions, such as material thickness, do not warrant the usage of a larger size bolt than M12.

Mechanical Properties of Bolts

Standard Specification: B.S. 4395 PT 1&2 Material: High Tensile Steel Strenght Grade: 8.8, 10.9 Screw Thread: 6G of ISO 965/2 Surface Finish: Black, Electro Galvanized, Hot Dipped Galvanized, Sherardised


6Page 6Technical: +44 (0)1226 383824

High Strength Friction Grip Nut

S

e

M

4395 PT2

S

e

M

4395 PT1

12

30o

m

c

df

1 2 3 4 5 6 7 8 9 10 11 12


Pitch of thread p

Width across flats s

Width across corners e

Diameter of washer df

Depth of washer face c

Thickness of nut m

Tolerance on squareness

(Coarse pitch series) max. min. max. min. max. min. max. max. min. max.

M12a 1.75 22.00 21.16 25.40 23.82 22.00 19.91 0.4 11.55 10.45 0.37

M16 2.0 27.00 26.16 31.20 29.30 27.00 24.91 0.4 15.55 14.45 0.46

M20 2.5 32.00 31.00 36.90 35.03 32.00 29.75 0.4 18.55 17.45 0.54

M22 2.5 36.00 35.00 41.60 39.55 36.00 33.75 0.4 19.65 18.35 0.61

M24 3.0 41.00 40.00 47.30 45.20 41.00 38.75 0.5 22.65 21.35 0.70

M27 3.0 46.00 45.00 53.10 50.85 46.00 43.75 0.5 24.65 23.35 0.78

M30 3.5 50.00 49.00 57.70 55.37 50.00 47.75 0.5 26.65 25.35 0.85

M36 4.0 60.00 58.80 69.30 66.44 60.00 57.75 0.5 31.80 30.20 1.03

a Non-preferred. Only to be used for the lighter type of construction where practical conditions, such as material thickness, do not warrant the usage of a larger size bolt than M12.

Proof loads for nuts (coarse pitch series)

1 2 3


Proof load

tonne-force (1000 kgf) kilo-newtons

M12 8.6 84.3

M16 16.0 157

M20 25.0 245

M22 30.9 303

M24 36.0 353

M27 46.8 459

M30 57.2 561

M36 83.3 817

NOTE 1: Based on 102 kgf/mm2 (1000 N/mm2) on the equivalent stress area of the corresponding bolt.

Dimensions of Hexagon Nuts

Standard Specification: B.S. 4395 PT 1&2 Material: High Tensile Steel Strenght Grade: 10, 12 Screw Thread: Conforms to Class 6H of ISO 965/2 Coarse Series Surface Finish: Black, Electro Galvanized, Hot Dipped Galvanized, Sherardised


7

B.S. 4395 Hardened Washer

Hardness Required Rockwell C 38 to 45 HRC

Page 7

1 2 3 4 5 6 7


Inside diameter B Outside diameter C Thickness A

max. min. max. min. max. min.

M12a 13.8 13.4 30 29 2.8 2.4

M16 17.8 17.4 37 36 3.4 3.0

M20 21.5 21.1 44 43 3.7 3.3

M22 23.4 23.0 50 48.5 4.2 3.8

M24 26.4 26.0 56 54.5 4.2 3.8

M27 29.4 29.0 60 58.5 4.2 3.8

M30 32.8 32.4 66 64.5 4.2 3.8

M36 38.8 38.4 85 83.5 4.6 4.2

a Non-preferred

Direct Tension Indicator WasherThe DTI is a specially hardened washer used totally independantly of the bolts torque resistance. DTI are one of four methods allowed to ensure that structural bolting is correctly installed.

Load indicator fitting

B.S. 4395 Metric series

General Grade Part 1 Higher Grade Part 2

max. min.

Under Bolt Head 0.40mm 0.50mm 0.40mm

All Platings 0.40mm 0.50mm 0.40mm

Under Nut 0.25mm 0.35mm 0.25mm

Table 1: Load indicator average gaps after tightening

At the average gaps shown the shank tension will be: For general bolts - not less than minimum given in Table 2. For higher grade Part 2 bolts within the tension limits in Table 2.

Bolt diameter

B.S. 4395 Metric series

General Grade Part 1min. proof

load

Higher grade Part 2

min. 0.85 x min. proof

load

max.1.15 x min. proof

load

mm kN kN kN

M16 92 104 140

M20 144 162 219

M22 177 200 271

M24 207 233 316

M27 234 303 409

M30 286 370 500

M33 459 621

M36 418

Table 2: Shank tensions

Direct tension indica-tor size (Normal diameter

mm)A

Part 1/Type 8.8 Part2/Type 10.9 All types

Outside diameter (OD) mm Number

of protru-sions

(equally spaced

Thickness mm Outside diameter (OD) mm Number

of protru-sions

(equally spaced)

Thickness mm Inside diameter (ID) mm protrusion

tangential diameter

(PTD) max, mmmin. max.

Without protru-

sionmin.

With pro-trusionmax.

min. max.

Without protru-

sionmin.

With pro-trusionmax.

Uncoated min.

Uncoatedmax.

M16 35.2 36.8 4 3.2 5.5 35.2 36.8 4 3.6 6.0 16.75 16.85 25

M20 44.0 46.0 5 3.6 6.0 44.0 46.0 6 3.6 6.0 20.95 21.05 29

M22 48.4 50.6 5 3.6 6.0 48.4 50.6 6 4.0 7.0 23.05 23.15 33

M24 52.8 55.2 5 4.0 7.0 52.8 55.2 6 4.0 7.0 25.15 25.25 38

M27 59.4 62.1 6 4.0 7.0 59.4 62.1 7 4.0 7.0 28.30 28.40 43

M30 66.0 69.0 7 4.0 7.0 66.0 60.0 8 4.8 7.5 31.45 31.55 46.5

M36 79.2 82.8 8 4.8 7.5 79.2 82.8 9 4.8 7.5 37.75 37.85 56

Dimensions


Standard Specification: B.S. 4395 PT1 Material: Hardenable Steel Material Properties: 38 to 45 HRC Surface Finish: Black, Electro Galvanized, Hot Dipped Galvanized, Sherardised

Standard Specification: B.S. 7644 PT1 & 2, F959M Material: Hardened Steel Material Properties: 8.8, 10.9 Surface Finish: Black, Sherardised

O.DP.T.D

I.D

Direct Tension InicatorCB

M

H12

M

O.DP.T.D

I.D

Direct Tension Inicator

H12

M10.9

Metric SeriesGeneral Grade Part 1

O.DP.T.D

I.D


M

H12

M

O.DP.T.D

I.D


H12

M10.9

BS 4395 HigherGrade Part 2

O.DP.T.D

I.D


M

H12

M

O.DP.T.D

I.D


H12

M10.9

8Page 8Technical: +44 (0)1226 383824

DIN 6914 Bolt

d

K LS

b

BG

10.9

HV

d M12 M16 M20 M22 M24 M27 M30

Pitch 1,75 2 2,5 2,5 3 3 3,5

b(at L <) 21(40) 26(70) 31(85) 32(85) 34(85) 37(95) 40(95)

(at L >) 23(40) 28(70) 33(85) 34(85) 37(85) 39(95) 42(95)

k 8 10 13 14 15 17 19

S 22 27 32 36 41 46 50

Assembly Data

Assembly pre-load in kN 50 100 160 190 220 290 350

Tightening torque in Nm

Black 120 350 600 900 1100 1650 2200

HOT D.G. 100 250 450 650 800 1250 1650

d M12 M16 M20 M22 M24 M27 M30 M36

Pitch 1,75 2 2,5 2,5 3 3 3,5 4

E 10 13 16 18 20 22 24 29

S 22 27 32 36 41 46 50 60

nom. size M12 M16 M20 M22 M24 M27 M30 M36

d1 13 17 21 23 25 28 31 37

d2 24 30 37 39 44 50 56 66

s 3 4 4 4 4 5 5 6

S

d1 d2

SE

d

BG

10

M

Standard Specification: B.S. 7644 PT1 & 2, F959M Material: Hardened Steel Material Properties: 8.8, 10.9 Surface Finish: Black, Sherardised

Standard Specification: DIN 6914 ISO 7412 Material: High Tensile Steel Strenght Grade: HV 10.9 Screw Thread: 6G of ISO 965/2 Surface Finish: Black, Hot Dipped Galvanized

DIN 6915 Nut DIN 6916 Washer

Standard Specification: DIN 6916 ISO 7416 Material: Hardenable Steel Material Properties: C45 Surface Finish: Black, Hot Dipped Galvanized

Standard Specification: DIN 6915 ISO 7414 Material: High Tensile Steel Material Properties: 10 Surface Finish: Black, Hot Dipped Galvanized


9

A325M Bolt

Page 9


D S E K B (Ref)

Nominal bolt diameter and thread pitch

Width across flats Width across corners Head heightThread length

Bolt lengths ≤ 100 Bolt lengths > 100

max. min. max. min. max. min. Basic

M16 x 2 27.00 26.16 31.18 29.56 10.75 9.25 31 38

M20 x 2.5 34.00 33.00 39.26 37.29 13.40 11.60 36 43

M22 x 2.5 36.00 35.00 41.57 39.55 14.90 13.10 38 45

M24 x 3 41.00 40.00 47.34 45.20 15.90 14.10 41 48

M27 x 3 46.00 45.00 53.12 50.85 17.90 16.10 44 51

M30 x 3.5 50.00 49.00 57.74 55.37 19.75 17.65 49 56

M36 x 4 60.00 58.80 69.28 66.44 23.55 21.45 56 63

Table 1: Dimensions of Heavy Hex Structural Bolts (ANSI B18.2.3.7M)

15-30o

H L

S

E

B (REF)

BG

K1C

EBG

A325M

A490MA490M Bolt

Nominal Bolt

Dia & Thread Pitch

Stress Area, mm2

Proof Load Length

Measure-ment

Method, kN

Proof Load Yeild Strength-Method,

kN

Tensile Strength min, kN

Hardness

Rockwell Vickers

min. max. min. max.

M16 x 2 157 94.2 104 130

C23 C34 255 336

M20 x 2.5 245 147 162 203

M22 x 2.5 303 182 200 251

M24 x 3 353 212 233 293

M27 x 3 459 275 303 381

M30 x 3.5 561 337 370 466

M36 x 4 817 490 539 678

A325M Bolt A490M Bolt

Nomi-nal Bolt Dia &

Thread Pitch

Stress Area, mm2

Proof Load, kN

Tensile Strength, kN

Product Hardness Surface Hardness

Length Meas-

urement Method

Yield Strength Method

HRC (Rockwell C)

HV (Vickers)

HR 30N (Rockwell

30N)

min. max. min. max. min. max. max.

M16 x 2 157 130 148 163 188

33 39 327 382 59

M20 x 2.5 245 203 230 255 294

M22 x 2.5 303 251 285 315 364

M24 x 3 353 293 332 367 424

M27 x 3 459 381 431 477 551

M30 x 3.5 561 466 527 583 673

M36 x 4 817 678 768 850 980

Standard Specification: A325M B18.2.3.7M Material: Medium Carbon Steel Strength Grade: 8.8 Screw Thread: ASME B1.13 6G Surface Finish: Black, Hot Dipped, Galvanised

Standard Specification: A490M B18.2.3.7M Material: Alloy Steel Strength Grade: 10.9 Screw Thread: ASME B1.13 6G Surface Finish: Black

10Page 10Technical: +44 (0)1226 383824

Nominal nut diameter and thread pitch

S E M

Width across flats Width across corners Thickness


M16 x 2 27.00 26.16 31.18 29.56 17.1 16.4

M20 x 2.5 34.00 33.00 39.26 37.29 20.7 19.4

M22 x 2.5 36.00 35.00 41.57 39.55 23.6 22.3

M24 x 3 41.00 40.00 47.34 45.20 24.2 22.9

M27 x 3 46.00 45.00 53.12 50.85 27.6 26.3

M30 x 3.5 50.00 49.00 57.74 55.37 30.7 29.1

M36 x 4 60.00 58.80 69.28 66.44 36.6 35.0

Table 2: Dimensions of Heavy Hex Nuts (ANSI B18.2.4.6M)

Nominal washer size

(bolt diameter)

Flat circular washers

A B C

Inside Outside Thickness


16 18.4 18.0 34.0 32.4 4.6 3.1

20 22.5 22.0 42.0 40.4 4.6 3.1

22 24.5 24.0 44.0 42.4 4.6 3.4

24 26.5 26.0 50.0 48.4 4.6 3.4

27 30.5 30.0 56.0 54.1 4.6 3.4

30 33.6 33.0 60.0 58.1 4.6 3.4

36 39.6 39.0 72.0 70.1 4.6 3.4

Table 3: Circular Washers for High-Strength Structural Bolts

High Strength Nuts & Washers

S

E

MM

BG

A563M

M

BC

A


Standard Specification: A563M ANSI B18.2.4.6M Material: Carbon and Alloy Steel Strength Grade: 8S, 10S Screw Thread: AME B18.2.4.1M Surface Finish: Black, Hot Dipped, Galvanised

Standard Specification: A436M Material: Hardenable Steel Material Properties: 38 to 45 HRC Surface Finish: Black, Hot Dipped, Galvanised

A563M Nut

F436M Washer

11

High Strength T.C Bolts (JSS II 09)

Page 11

GripLength

boltLength

T.C. Bolts, improved type of heavy hexagonal structural bolts, were developed for more simplified bolt fastening and more accurate performance and offer such excellent characteristics as shown below because no fastening technique of high level is required:

1. Controlled clamping force can be ensured.2. Completion of bolt fastening can be confirmed by the shear-off of the notched end of the bolt.3. Fastening can easily be done by electric wrench.4. Noiseless installation and no need of wrench adjustment.5. The bolt does not rotate when fastening.6. No apprehension of bolts being left unfastened.

Classes and grades

Classes of sets Combination of grade according to mechanical properties of component parts

Class according to mechanical properties Bolt Nut Washer

Class 2 S 10 T F 10 F 35

Grade of bolt according to mechanical properties

Tensile Load(Min KN)

HardnessNominal size of threads

M16 M20 M22 M24 M27 M30

S 10 T 157 245 303 353 459 561 HRC27 ~ 38

Full Size Bolts

Grade of nut according to mechanical properties

Hardness

Proof loadmin. max.

F 10 HRB 95 HRC 35 Same as tensile load (min.) of bolt

Nuts

Grade of washer according to mechanical properties Hardness

F 35 HRC 35 ~ 45

Hardness of Washers

Nominal size of threads To determine required bolt length add to grip

M16 25

M20 30

M22 35

M24 40

M27 45

M30 50

Determination of Bolt Length

Features of High Strength T.C. (Tension Control) Bolts

Before Clamping Before Clamping

The bolt reacts to the fastening torque and the notched end of the bolt shears off. The required clamping force is thus given.

After Clamping

Bolt tip

Notch

Thread

Connected part

Washer

Nut/Fastening Torque

Outer Sleeve

Reaction

Inner Sleeve


Grade of bolt according to mechanical properties

Yield strength (N/mm2)

Tensile strength (N/mm2)

Elongation(%)

Reduction of area (%)

S 10 T 900min. 1000~1200min. 14min. 40min.

Mechanical Properties

12Page 12Technical: +44 (0)1226 383824

GripLength

boltLength

Nominal bolt length (I) Tolerance

30 upto 50 ± 1.0

55 upto 120 ± 1.4

125 upto 180 ± 1.8

Note: The measuring point for d1 should be l0=d1/4

Nominal size of threads

(d)

Outside diameter external thread

H B C D D1

hBasic dimension Tolerance Basic

dimension Tolerance Approx. Approx. Min.

M16 16 16 ±0.35 270~

-0.831.2 25 25

0.4~

-0.8

M20 20 20

±0.4

32

0~-1

37.0 30 29

M22 22 22 36 41.6 34 33

M24 24 24 41 47.3 39 38

M27 27 27 46 53.1 44 43

M30 30 30 50 57.7 48 47l

H

l0

S

50 s

50 s

r

D

d1 B

C

d

D1

90o - 120o50 s

h

D

30o

H

50 s

l

H

l0

S

50 s

50 s

r

D

d1 B

C

d

D1

90o - 120o50 s

h

D

30o

H

50 s


(d)

d1 H D

r

s

Basic dimension Tolerance Basic

dimension Tolerance min. Basic dimension Tolerance

M16 16+0.7

~-0.2

10 ±0.8 26

1.2~2.0

30+5~0

M20 20

+0.8~

-0.4

13

±0.9

33 35

+6~0

M22 22 14 37 40

M24 24 15 411.6~2.4

45

M27 27 17 47 50

M30 30 19 ±1.0 53 2.0~2.8 55

Nominal size of washers

d D t

Basic dimension Tolerance Basic

dimension Tolerance Basic dimension Tolerance

M16 17+0.7

~0

32

0~-1

4.5 ±0.5

M20 21

+0.8~0

40

M22 23 44

6

±0.7

M24 25 48

M27 28 56

M30 31+1.0

~0

600~

-1.28


Minimum fastener tension

S 10 T

M16 106

M20 165

M22 205

M24 238

M27 310

M30 379

Fastener Tension

Dt

50 s

d

Plain Washers

High Strength Tension control Bolts

Heavy Hexagon Nuts


13

Tie Rods

Page 13


Product Specification

Allthread or studding can be made into any length required. We can offer a short

piece cropped and roll threaded option. For longer lengths we provide a cutting

service with standard diameters M8-M64in 1000mm and 3000mm stock length.

We also offer all diameters, grades and finishes in angled cut studs for resin

anchor applications.

Available Grades & Thread Forms

All available in Self Colour Hot Dipped Galvanised

Bright Zinc Plated and Sheradized.

Materials include:

• Mild Steel

• High Tensile 8.8, 10.9 & B7

• Brass

• Stainless Steel

Available in a variety of thread types including:

• Metric (ISO and Fine Pitch)

• Left Hand

• BSW, UNC, UNF

• Resin Anchor Studs

B

A

X

A

X1 X2

B

A

X

A

X1 X2

All Thread/Studding


These round steel bars can have either clean-sawn or cropped ends. Intended

for use in expansion or contraction joints, a wide range of standard sizes are

available for immediate delivery. Available in mill length to 12,000mm/40ft and

upto 64mm/21/2 diameters, before delvery to site, the tie rods may be cut to a

specified length.

Available Grades

Bapp holds stocks of mild steel (4.6), high tensile (8,8) and stainless steel grade A2

and A4. We also offer materials B7, B8 and other exotic non-ferrous materials.

Corrosion Protection

Corrosion protection is one of the most important elements in providing long-term

durability of any tie rod installation. There are a number of possibilities depending

on the site conditions and degree of exposure. Examples of successful corrosion

protection currently in use are:

• Electro Zinc Plating

• Galvanizing

• Sherardizing

• Epoxy Coating

14Page 14Technical: +44 (0)1226 383824

Flat Round Washers

ID

O

T


All DIN125 and BS4320 form A-C washers are manufactured to precision tolerances and are termed bright mild steel. Available as standard in BZP finish. All DIN125 and BS4320 form E-G washers are manufactured to wider tolerances and are termed as black standard mild steel. Available in all finishes:

• Self-Colour• BZP• Galvanized• Sheradized

Stocking many types of flat washers such as:

• Bright Steel• Stainless Steel• Brass• Copper• Alluminium• Fibre

In order to suit traditional and developing high technology industries who require both metric and imperial dimensions. All our washers conform to the British, European and American standards, including:

• BS4310, BS4320, DIN125, DIN126, DIN128, DIN137

We can also manufacture washer specials for non-standard applications as well as our standard flat washers. Other standard washers we have in stock include:

• Chamfer Washers• Mudguard Repair Washers• Spring Lock Washers• Serrated Lock Washers

IDBolt

diameter

Form A-mmOxT

Form B-mmOxT

Form C-mmOxT

Form E-mmOxT

Form F-mmOxT

Form G-mmOxT

M6 10.0x1.0 12.8x0.8 12.5x1.0 12.5x1.6 18.0x2.0

M8 17.0x1.6 17.0x1.0 21.0x1.6 17.0x1.6 21.0x1.6 24.0x2.0

M10 21.0x2.0 21.0x1.25 24.0x2.0 21.0x2.0 24.0x2.0 30.0x2.5

M12 24.0x2.5 24.0x1.6 28.0x2.5 24.0x2.5 28.0x2.5 36.0x3.0

M14 28.0x2.5 28.0x1.6 30.0x2.5 28.0x2.5 30.0x2.5 42.0x3.0

M16 30.0x3.0 30.0x2.0 34.0x3.0 30.0x3.0 34.0x3.0 48.0x4.0

M18 34.0x3.0 34.0x2.0 37.0x3.0 34.0x3.0 37.0x3.0 54.0x4.0

M20 37.0x3.0 37.0x2.0 39.0x3.0 37.0x3.0 39.0x3.0 60.0x5.0

M22 39.0x3.0 39.0x2.0 44.0x3.0 39.0x3.0 44.0x3.0 66.0x5.0

M24 44.0x4.0 44.0x2.5 50.0x4.0 44.0x4.0 50.0x4.0 72.0x6.0

M27 50.0x4.0 50.0x2.5 56.0x4.0 50.0x4.0 56.0x4.0 81.0x6.0

M30 56.0x4.0 56.0x2.5 60.0x4.0 56.0x4.0 60.0x4.0 90.0x8.0

M33 60.0x5.0 60.0x3.0 66.0x5.0 60.0x5.0 66.0x5.0 99.0x8.0

M36 66.0x5.0 66.0x3.0 72.0x5.0 66.0x5.0 72.0x5.0 108.0x10.0

M39 72.0x6.0 72.0x3.0 72.0x6.0 77.0x6.0 117.0x10.0

M42 78.0x7.0 78.0x4.0 78.0x7.0

M45 85.0x7.0 85.0x4.0 85.0x7.0

M48 92.0x8.0 92.0x6.0 92.0x8.0

B

A

X

A

X1 X2

Washer Dimensions


Form A Form B


15

Corrosion Protection Coatings

Page 15


Corrosion mainly affects the durability of fasteners, (i.e. their lasting strength, appearance and ease of dismantling) and may be caused by exposure to a particular environment during service. Depending upon the environmental condition one of the following coatings or finishes is recommended to enhance the life of fasteners.

Zinc plating - BS 3382 Part 2, DIN267 Part 9, ISO 4042

Usually bright finish on steel screws. Used for short term protection of all steel fasteners. Satisfactory for standard threads.

Hot dip zinc (galvanising) - BS 729 Part 1, DIN267 Part 10, ISO 1461

Heavy zinc deposits 43 microns minimum on steel for long term outdoor protection. Uneven coating unsuitable for many small diameter threaded parts.

Sherardizing is a diffusion process in which particles are heated in the presence of zinc dust. The process is normally carried out in a slowly rotating closed container at temperatures ranging from 320-500 degrees centigrade.

The resultant zinc/iron alloyed coating is subsequently zinc phosphated or chromated, resulting in a clean, passivated, matt grey surface. The coating closely follows the contours of the base material and uniform coatings are produced on articles, including those of intricate shapes. Carbon steels, low alloy steels sintered steels, malleable grey iron and cast iron are suitable for sherardizing. The process does not give rise to hydrogen embrittlement.

Sherardizing benefits include:

• Long Term Corrosion Protection • Coating thickness range available 15-80µm • Salt spray resistance Sherardizing - 96 hours Sherardizing 2000 - 500 hours

• Damage resistant • Uniform coating

Sherardizing BS4921 Class 1

Fasteners are subject to ever-increasing demands with regard to their reliability and resistance to corrosion. These stringent requirements present serious dilemmas for you. On one hand, strict reliability requirements mean that you are forced to use high quality fasteners (quality class 10.9 and higher). On the other hand, these fasteners are expected to have the same minimum corrosion resistant properties as the other parts of the product.

Until recently your choice was restricted to less reliable solutions.

DACROMET® 500 LC

If electro-galvanizing is chosen for high quality fasteners there is a concious risk of fractures as a result of hydrogen embrittlement. If you choose a more reliable surface coating such as thermal galvanizing of screw threaded products, you are not only restricted in terms of dimensions but also in terms of the fit of the internal and external screw thread. In order to carry out thermal galvanizing of relatively thick layers of zinc, some material has to be removed before galvanization. This means that the flank covering between the internal and external screw thread is lower which has negative consequences on the load capacity.

However if you specifically choose electroplating of a zinc coating and you want to suppress completely risk as a result of hydrogen embrittlement, then the choice of high quality fasteners is out of the question. In this case you will have to rely on lower quality fasteners with greater dimensions as a result. The new DACROMET® 500 LC Grade A non electrolytically applied surface coating eliminates all of these restrictive and high risk considerations.

Surface Coatings

16Page 16Technical: +44 (0)1226 383824

Chemical Analysis

Element C Mn P S Si Cr Ni Cu

%

Customer: Test Certificate No

Bapp O/No: Batch No:

Product Description:

Product Standard:

Heat No:

Finish S/COL BZP HDG ZYP OTHER

Mechanical Properties:

Test Item Test Method Standard Actual Results Remark

Hardness (HRC)

Tensile Strength (N/mm2)

Yield Strength (M/mm2)

Elongation (%)

Charpy V Notch

Dimensional:

Method Standard Actual Results Sampling Rej. Remarks

Width Across Flat

Head Height

Major Diameter

Thread Length

Radius Under Head

Visual

We hereby certify that all the above results are origional from our factories actual testing and the products have proved to comply to the relevant standards.If you require any other information regarding our certificates and standards, please contact our technical team on telephone: 01226 383824 or email: [email protected]

BAPP Group - Bolting Test Certificate

BAPPG r o u p o f C o m p a n i e sBapp Group Limited

Factory Head Markings

BP

M 8.8

BG

DG BI

BAPP BG

8.8

M 8.8

M 8.8 M 8.8

Factory 1Assembled DIN933

Factory 2Assembled DIN933

Factory 4DIN933 & DIN931

Factory 6Sq Sq

Factory 5Cup Sq

Factory 3DIN933 & DIN931

Speci

men

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