Full Face Flange Gasket Dimensions

Gasket Dimensions for ASME B16.5 Class 150, Pipe Flanges and Flanged Fittings
Full Face Gasket
Nominal Pipe Size, NPS Gasket
I.D.
Flat Ring O.D. O.D. No. of Holes Hole Diameter Bolt Circle Diameter
1/2 21 48 89 4 5/8 60.3
3/4 27 57 98 4 5/8 69.9
13/4 33 67 108 4 5/8 79.4
11/4 42 76 117 4 5/8 88.9
11/2 48 86 127 4 5/8 98.4
23/4 60 105 152 4 3/4 120.7
21/2 73 124 178 4 3/4 139.7
33/4 89 137 191 4 3/4 152.4
31/2 102 162 216 8 3/4 177.8
43/4 114 175 229 8 3/4 190.5
53/4 141 197 254 8 7/8 215.9
63/4 168 222 279 8 7/8 241.3
83/4 219 279 343 8 7/8 298.5
103/4 273 340 406 12 1 362.0
123/4 324 410 483 12 1 431.8
143/4 356 451 533 12 11/8 476.3
163/4 406 514 597 16 11/8 539.8
183/4 457 549 635 16 11/4 577.9
203/4 508 606 699 20 11/4 635.0
243/4 610 718 813 20 11/8 749.3

GENERAL NOTE: Dimensions are in millimeters, except for hole diameter dimensions, which are in inches.


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