Bolting Dimensions for 400 lb. Flanges

 

Nom

Diam

Diam

Nbr.

Length of Studs 1/4" Raised Face

Pipe

of Bolt

of

of

Size

Circle

Bolts

Bolts

0.5

2.625

0.5

4

3

0.75

3.25

0.625

4

3.25

1

3.5

0.625

4

3.5

1.25

3.875

0.625

4

3.75

1.5

4.5

0.75

4

4

2

5

0.625

8

4

2.5

5.875

0.75

8

4.5

3

6.625

0.75

8

4.75

3.5

7.25

0.875

8

5.25

4

7.875

0.875

8

5.25

5

9.25

0.875

8

6.5

6

10.625

0.875

12

5.75

8

13

1

12

6.5

10

15.25

1.125

16

7.25

12

17.75

1.25

16

7.75

14

20.25

1.25

20

8

16

22.5

1.375

20

8.5

18

24.75

1.375

24

8.75

20

27

1.5

24

9.5

22

29.25

1.625

24

10

24

32

1.75

24

10.5

26

34.5

1.75

28

11.5

30

39.25

2

28

13

34

43.5

2

28

13.75

36

46

2

32

14

42

52.75

2.5

32

16.25

Stud lengths for lap joint flanges are equal to lengths shown minus 0.5"plus the thickness of two laps of the stub ends.