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300 lb full face ANSI Flange Dimension Specifications

Full Face Gaskets for 300 lb ASME/ANSI Pipe Flanges
Nominal Pipe Size Gasket Number of Bolt Holes Diameter of Bolt Holes Bolt Circle
I.D.  O.D.
1" 
1 5/16" 
4 7/8" 
4
3/4"
3 1/2"
1 1/4"
1 21/32"
5 1/4" 
4
3/4"
3 7/8"
1 1/2"
1 29/32"
6 1/8" 
4
7/8"
4 1/2"
2" 
2 3/8" 
6 1/2" 
8
3/4"
5" 
2 1/2"
2 7/8" 
7 1/2" 
8
7/8"
5 7/8"
3" 
3 1/2" 
8 1/4" 
8
7/8"
6 5/8"
3 1/2"
4" 
9" 
8
7/8"
7 1/4"
4" 
4 1/2" 
10" 
8
7/8"
7 7/8"
5" 
5 9/16" 
11" 
8
7/8"
9 1/4"
6" 
6 5/8" 
12 1/2" 
12
7/8"
10 5/8"
8" 
8 5/8" 
15" 
12
1" 
13" 
10" 
10 3/4" 
17 1/2" 
16
1 1/8"
15 1/4"
12" 
12 3/4" 
20 1/2" 
16
1 1/4"
17 3/4"
14" 
14" 
23" 
20
1 1/4"
20 1/4"
16" 
16" 
25 1/2" 
20
1 3/8"
22 1/2"
18" 
18" 
28" 
24
1 3/8"
24 3/4"
20" 
20" 
30 1/2" 
24
1 3/8"
27" 
22" 
22" 
33" 
24
1 5/8"
29 1/4"
24" 
24" 
36" 
24
1 5/8"
32" 
26" 
26" 
38 1/4" 
28
1 7/8"
34 1/2"
28" 
28" 
40 3/4" 
28
1 7/8"
37" 
30" 
30" 
43"
28
1 7/8"
39 1/4"
32"
32" 
45 1/4" 
28
1 7/8"
41 1/2"
34" 
34"
47 1/2" 
28
1 7/8"
43 1/2"
36" 
36" 
50" 
32
2 1/8"
46" 
38" 
38" 
52 1/4" 
32
2 1/8"
48" 
40" 
40" 
54 1/2" 
36
2 1/8"
50 1/4"
42" 
42" 
57" 
36
2 1/8"
52 3/4"
44" 
44" 
59 1/4" 
36
2 1/8"
55" 
46" 
46" 
61 1/2" 
40
2 1/8"
57 1/4"
48" 
48" 
65" 
40
2 1/8"
60 3/4"
Standard thickness 1/16" and 1/8"; other thicknesses available by special order