Fastener

Heavy Hex Bolt / Flange Bolt

    Types: 1, 2, 3, T, M

     

    Connection types: SC, N, X

     

    Minimum order quantity: 10, 000 pieces

Specification of Heavy Hex Structural Bolt:
1. Types: 1, 2, 3, T, M
2. Connection types: SC, N, X
3. Minimum order quantity: 10, 000 pieces

4. Grade: ASTM A325, ASTM A490

Specification of ASTM A325 Heavy Hex Structural Bolt:
1. Types:


2. Connection Types:

3. Chemical Properties:


Recommended Nuts and Washers:


 Specification of ASTM A490 Heavy Hex Structural Bolt:
1. Types:

2. Connection Types:


3. Mechanical Properties: 


4. Chemical Properties:



Notes:
1. The bolts shall not be coated by hot-dip zinc coating, mechanical deposition, or electroplating with zinc due to the potential for hydrogen embrittlement. ASTM has approved coating A490 bolts with Zinc/Aluminum Corrosion Protective Coatings per ASTM F1136 Grade 3, commercially called dacromet. Read more about issues with galvanizing ASTM A490.
2. Each sample representative of the lot shall be magnetic particle inspected for longitudinal discontinuities and transverse cracks.

Here is an example of DIN6921 Flange Bolt Dimension:

Thread Size

M5

M6

M8

M10

M12

M14

M16

M20

Pitch

0.8

1

1.25

1.5

1.75

2

2

2.5

bL125

16

18

22

26

30

34

38

46

b125L200

28

32

36

40

44

52

bL200

57

65

dc

11.8

14.2

18

22.3

26.6

30.5

35

43

k

5.4

6.6

8.1

9.2

11.5

12.8

14.4

17.1

e

8.71

10.95

14.26

16.5

17.62

19.86

23.15

29.87

S

8

10

13

15

16

18

21

27

L

10-50

12-60

16-80

20-100

25-120

30-140

35-160

40-200

 

 

Here is an example of IFI C-28 Flange Bolt Dimension:

Thread Size

1/4"

5/16"

3/8"

7/16"

1/2"

9/16"

5/8"

1/11"

Thread per inch

20

18

16

14

13

12

11

10

k

0.28

0.32

0.39

0.46

0.51

0.57

0.62

0.73

dc

0.56

0.68

0.81

0.93

1.07

1.19

1.33

1.59

S

3/8

1/2

9/16

5/8

3/4

13/16

15/16

1-1/8"

e

0.409

0.548

0.618

0.685

0.825

0.895

1.034

1.234

L

1/2"-4

5/8"-4

3/4"-4

7/8"-4

7/8"-4

1"-6

1"-6

1 1/4"-6

 

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