Class 300 Flange information

diameter

number of

diameter

stud bolt length

pipe size

outside

bolt circle

bolt hole

bolt holes

of bolts

0.06" raised face


0.50


3.75


2.62


0.625


4


0.500


2.50

0.75

4.62

3.25

0.750

4

0.625

3.00

1.00

4.88

3.50

0.750

4

0.625

3.00

1.25

5.25

3.88

0.750

4

0.625

3.25

1.50

6.12

4.50

0.875

4

0.750

3.50

2.00

6.50

5.00

0.750

8

0.625

3.50

2.50

7.50

5.88

0.875

8

0.750

4.00

3.00

8.25

6.62

0.875

8

0.750

4.25

3.50

9.00

7.25

0.875

8

0.750

4.25

4.00

10.00

7.88

0.875

8

0.750

4.50

5.00

11.00

9.25

0.875

8

0.750

4.75

6.00

12.50

10.62

0.875

12

0.750

4.75

8.00

15.00

13.00

1.000

12

0.875

5.50

10.00

17.50

15.25

1.125

16

1.000

6.25

12.00

20.50

17.75

1.250

16

1.125

6.75

14.00

23.00

20.25

1.250

20

1.125

7.00

16.00

25.50

22.50

1.375

20

1.250

7.50

18.00

28.00

24.75

1.375

24

1.250

7.75

20.00

30.50

27.00

1.375

24

1.250

8.00

24.00

36.00

32.00

1.625

24

1.500

9.00