Submittal Sheet

Flange Compatibility Chart • Spec Sheet
A.S.A Flanged Fittings
Class 125 Cast Iron Flanges and Fittings
Dimensions of Cast Iron Flanges, Bolts, and Ring Gaskets
Nominal
Pipe Size
Diam. of
Flange
Thickness¹
of Flanges
(Min.)
Diam.
of Bolt
Circle
Number²
of Bolts
Diam. of
Bolts
Diam.² of
Bolt Holes
Length
3,4
of Bolts
Size of Flat Ring
Gasket
1/2 4 1/2
3/4 4 1/2
1 4 1/4 7/16 3 1/8 4 1/2 5/8 1 3/4 1 x 2-5/8
1 1/4 4 5/8 1/2 3 1/2 4 1/2 5/8 2 1-1/4 x 3
1 1/2 5 9/16 3 7/8 4 1/2 5/8 2 1-1/2 x 3-3/8
2 6 5/8 4 3/4 4 5/8 3/4 2 1/4 2 x 4-1/8
2 1/2 7 11/16 5 1/2 4 5/8 3/4 3 2-1/2 x 4-7/8
3 7 1/2 3/4 6 4 5/8 3/4 3 3 x 5-3/8
3 1/2 8 1/2 13/16 7 8 5/8 3/4 3 3-1/2 x 6-3/8
4 9 15/16 7 1/2 8 5/8 3/4 3 4 x 6-7/8
5 10 15/16 8 1/2 8 3/4 7/8 3 5 x 7-3/4
6 11 1 9 1/2 8 3/4 7/8 3 1/2 6 x 8-3/4
8 13 1/2 1 1/3 11 3/4 8 3/4 7/8 3 1/2 8 x 11
10 16 1 3/16 14 1/4
12 7/8 1 4 10 x 13-3/8
12 19 1 1/4 17 12 7/8 1 4 12 x 16-1/8
14 OD 21 1 3/8 18 3/4 12 1 1 1/8 4 1/2 14 x 17-3/4
16 OD 23 1/2 1 7/16 21 1/4 16 1 1 1/8 4 1/2 16 x 20-1/4
18 OD 25 1 9/16 22 3/4 16 1 1/8 1 1/4 5 18 x 21-5/8
20 OD 27 1/2 1 11/16 25 20 1 1/8 1 1/4 5 20 x 23-7/8
24 OD 32 1 7/8 29 1/2 20 1 1/4 1 3/8 5 1/2 24 x 28-1/4
30 OD 38 3/4 2 1/8 36 28 1 1/4 1 3/8 6 1/2 30 x 34-3/4
36 OD 46 2 3/8 42 3/4 32 1 1/2 1 5/8 7 36 x 41-1/4
42 OD 53 2 5/8 49 1/2 36 1 1/2 1 5/8 7 1/2 42 x 48
48 OD 59 1/2 2 3/4 56 44 1 1/2 1 5/8 8 48 x 54-1/2
*54 OD 66 1/4 3 62 3/4 44 1 3/4 2 10 1/2 54 x 61
*60 OD 73 3 1/8 69 1/4 52 1 3/4 2 10 3/4 60 x 67-1/2
*72 OD 86 1/2 3 1/2 82 1/2 60 1 3/4 2 11 1/2 72 x 80-3/4
*84 OD 99 3/4 3 7/8 95 1/2
64 2 2 1/4 12 3/4 84 x 93-1/2
*96 OD 113 1/4 4 1/4 108 1/2 68 2 1/4 2 1/2 14 96 x 106-1/4
All dimensions given in inches.
*These are included for convenience and do not carry a definite rating.