Gasket Dimensions for Flat Ring and Full Face Applications

ASME B16.47 Series A Class 300 (Previously MSS SP44)

Nominal Bore Gasket ID IBC Gasket OD Full Face Nominal Bore
Gasket OD Diameter of Bolt Holes Bolt P.C.D. Number of Bolt Holes
Inches mm Inches mm Inches mm Inches mm Inches mm
22 550 22 558.8 27 3/4 704.9 33 838.2 1 5/8 41.3 29 1/4 743.0 24 22
26 650 26 660.4 32 22/25 835.2 38 1/4 971.6 1 3/4 44.5 34 1/2 876.3 28 26
28 700 28 711.2 35 19/50 898.7 40 3/4 1035.1 1 3/4 44.5 37 939.8 28 28
30 750 30 762.0 37 1/2 952.5 43 1092.2 1 7/8 47.6 39 1/4 997.0 28 30
32 800 32 812.8 39 46/73 1006.6 45 1/4 1149.4 2 50.8 41 1/2 1054.1 28 32
34 850 34 863.6 41 31/50 1057.1 47 1/2 1206.5 2 50.8 43 1/2 1104.9 28 34
36 900 36 914.4 44 1117.6 50 1270.0 2 1/8 54.0 46 1168.4 32 36
38 950 38 965.2 41 1/2 1054.1 46 1168.4 1 5/8 41.3 43 1092.2 32 38
40 1000 40 1016.0 43 22/25 1114.6 47 1/2 1206.5 1 3/4 44.5 45 1/2 1155.7 32 40
42 1050 42 1066.8 45 22/25 1165.4 50 3/4 1289.1 1 3/4 44.5 47 1/2 1206.5 32 42
44 1100 44 1117.6 48 1219.2 53 3/4 1365.3 1 7/8 47.6 49 3/4 1263.7 32 44
46 1150 46 1168.4 50 3/25 1273.0 55 3/4 1416.1 2 50.8 52 1320.8 28 46
48 1200 48 1219.2 52 3/25 1323.8 57 3/4 1466.9 2 50.8 54 1371.6 32 48
50 1250 50 1270.0 54 1/4 1378.0 60 1/4 1530.4 2 1/8 54.0 56 1/4 1428.8 32 50
52 1300 52 1320.8 56 1/4 1428.8 62 1/4 1581.2 2 1/8 54.0 58 1/4 1479.6 32 52
54 1350 54 1371.6 58 3/4 1492.3 65 1/4 1657.4 2 3/8 60.3 61 1549.4 28 54
56 1400 56 1422.4 60 3/4 1543.1 67 1/4 1708.2 2 3/8 60.3 63 1600.2 28 56
58 1450 58 1473.2 62 3/4 1593.9 69 1/4 1759.0 2 3/8 60.3 65 1651.0 32 58
60 1500 60 1524.0 64 3/4 1644.7 71 1/4 1809.8 2 3/8 60.3 67 1701.8 32 60