ANSI B16.5 Class 600 Blind Flanges Nominal Pipe Size 0.5-24 in

Nominal Pipe Size

Outside Diameter (O)

Thickness (T)

Raised Face Diameter (R)

Approximate Weight (lbs)

Bolt Circle (C)

Number of Holes

Diameter of Holes

 1/2

3.75

0.56

1.38

2

2.63

4

0.63

 3/4

4.63

0.63

1.69

3

3.25

4

0.75

1

4.88

0.69

2

4

3.5

4

0.75

1 1/4

5.25

0.81

2.5

5

3.88

4

0.75

1 1/2

6.13

0.88

2.88

8

4.5

4

0.88

2

6.5

1

3.63

10

5

8

0.75

2 1/2

7.5

1.13

4.13

15

5.88

8

0.88

3

8.25

1.25

5

20

6.63

8

0.88

3 1/2

9

1.38

5.5

29

7.25

8

1

4

10.75

1.5

6.19

41

8.5

8

1

5

13

1.75

7.31

68

10.5

8

1.13

6

14

1.88

8.5

86

11.5

12

1.13

8

16.5

2.19

10.63

140

13.75

12

1.25

10

20

2.5

12.75

230

17

16

1.38

12

22

2.63

15

295

19.25

20

1.38

14

23.75

2.75

16.25

355

20.75

20

1.5

16

27

3

18.5

495

23.75

20

1.63

18

29.25

3.25

21

630

25.75

20

1.75

20

32

3.5

23

810

28.5

24

1.75

22

34.25

3.75

25.25

1000

30.63

24

1.88

24

37

4

27.25

1250

33

24

2