ANSI B16.5 Class 900 Threaded Flanges Raised Face Diameter 1.38-27.25 in

Nominal Pipe Size

Outside Diameter (O)

Thickness (T)

Raised Face Diameter (R)

Length Thru Hub (Y)

Hub Diameter (X)

Approximate Weight (lbs)

Bolt Circle (C)

Number of Holes

Diameter of Holes

 1/2

4.75

0.88

1.38

1.25

1.5

4

3.25

4

0.88

 3/4

5.13

1

1.69

1.38

1.75

5

3.5

4

0.88

1

5.88

1.13

2

1.63

2.06

8

4

4

1

1 1/4

6.25

1.13

2.5

1.63

2.5

9

4.38

4

1

1 1/2

7

1.25

2.88

1.75

2.75

12

4.88

4

1.13

2

8.5

1.5

3.63

2.25

4.13

25

6.5

8

1

2 1/2

9.63

1.63

4.13

2.5

4.88

36

7.5

8

1.13

3

9.5

1.5

5

2.13

5

26

7.5

8

1

4

11.5

1.75

6.19

2.75

6.25

53

9.25

8

1.25

5

13.75

2

7.31

3.13

7.5

83

11

8

1.38

6

15

2.19

8.5

3.38

9.25

110

12.5

12

1.25

8

18.5

2.5

10.63

4

11.75

170

15.5

12

1.5

10

21.5

2.75

12.75

4.25

14.5

245

18.5

16

1.5

12

24

3.13

15

4.63

16.5

325

21

20

1.5

14

25.25

3.38

16.25

5.13

17.75

400

22

20

1.63

16

27.75

3.5

18.5

5.25

20

425

24.25

20

1.75

18

31

4

21

6

22.25

600

27

20

2

20

33.75

4.25

23

6.25

24.5

730

29.5

20

2.13

24

41

5.5

27.25

8

29.5

1400

35.5

20

2.63