Standard Size O-Rings (Nominal Dimensions)
O-Rings
Explore our AS-568 & Extended Standard Size O-Rings including our new 5/32" Nominal Cross Section O-Rings. Precision Associates' O-Rings are available off the shelf in several standard compounds. Or try O-Rings in one of 1,200+ specialty materials in 20 polymer groups, including Viton®, AFLAS®, EPDM, Nitrile, HNBR (HSN), XNBR, Neoprene®, Butyl, XNBR, Silicone, Fluorosilicone, Perfluoroelastomer, Urethane, Hypalon®, and Hydrin®.
Click here to view our 48 (5Mb) Catalog illustrated with full-size drawings of Standard Size O-Rings plus Dimensions and Tolerances.
Click here to view our 48 (5Mb) Catalog illustrated with full-size drawings of Standard Size O-Rings plus Dimensions and Tolerances.
Item # |
C/S (inches) |
C/S Tolerance (±) |
I.D. (inches) |
I.D. Tolerance (±) |
O.D. (REF) (inches) |
Nominal C/S (inches) |
Nominal I.D. (inches) |
Nominal O.D. (inches) |
Metric C/S (mm) |
Metric I.D. (mm) |
Metric O.D. (mm) |
---|---|---|---|---|---|---|---|---|---|---|---|
1-373 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 8.975 | I.D. Tolerance (±) N/A 0.050 | O.D. (REF) (inches) N/A 9.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 9 | Nominal O.D. (inches) N/A 9 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 228.0 | Metric O.D. (mm) N/A 238.6 |
1-372 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 8.725 | I.D. Tolerance (±) N/A 0.050 | O.D. (REF) (inches) N/A 9.145 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 8 3/4 | Nominal O.D. (inches) N/A 9 1/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 221.6 | Metric O.D. (mm) N/A 232.3 |
1-371 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 8.475 | I.D. Tolerance (±) N/A 0.050 | O.D. (REF) (inches) N/A 8.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 8 1/2 | Nominal O.D. (inches) N/A 8 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 215.3 | Metric O.D. (mm) N/A 225.9 |
1-370 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 8.225 | I.D. Tolerance (±) N/A 0.050 | O.D. (REF) (inches) N/A 8.645 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 8 1/4 | Nominal O.D. (inches) N/A 8 5/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 208.9 | Metric O.D. (mm) N/A 219.6 |
1-369 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 7.975 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 8.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 8 | Nominal O.D. (inches) N/A 8 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 202.6 | Metric O.D. (mm) N/A 213.2 |
1-368 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 7.725 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 8.145 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 7 3/4 | Nominal O.D. (inches) N/A 8 1/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 196.2 | Metric O.D. (mm) N/A 206.9 |
1-367 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 7.475 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 7.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 7 1/4 | Nominal O.D. (inches) N/A 7 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 189.9 | Metric O.D. (mm) N/A 200.5 |
1-366 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 7.225 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 7.645 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 7 1/2 | Nominal O.D. (inches) N/A 7 5/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 183.5 | Metric O.D. (mm) N/A 194.2 |
1-365 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 6.975 | I.D. Tolerance (±) N/A 0.040 | O.D. (REF) (inches) N/A 7.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 7 | Nominal O.D. (inches) N/A 7 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 177.2 | Metric O.D. (mm) N/A 187.8 |
1-364 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 6.725 | I.D. Tolerance (±) N/A 0.040 | O.D. (REF) (inches) N/A 7.145 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 6 3/4 | Nominal O.D. (inches) N/A 7 1/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 170.8 | Metric O.D. (mm) N/A 181.5 |
1-363 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 6.475 | I.D. Tolerance (±) N/A 0.040 | O.D. (REF) (inches) N/A 6.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 6 1/2 | Nominal O.D. (inches) N/A 6 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 164.5 | Metric O.D. (mm) N/A 175.1 |
1-362 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 6.225 | I.D. Tolerance (±) N/A 0.040 | O.D. (REF) (inches) N/A 6.645 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 6 1/4 | Nominal O.D. (inches) N/A 6 5/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 158.1 | Metric O.D. (mm) N/A 168.8 |
1-361 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 5.975 | I.D. Tolerance (±) N/A 0.037 | O.D. (REF) (inches) N/A 6.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 6 | Nominal O.D. (inches) N/A 6 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 151.8 | Metric O.D. (mm) N/A 162.4 |
1-360 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 5.850 | I.D. Tolerance (±) N/A 0.037 | O.D. (REF) (inches) N/A 6.270 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 5 7/8 | Nominal O.D. (inches) N/A 6 1/4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 148.6 | Metric O.D. (mm) N/A 159.3 |
1-359 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 5.725 | I.D. Tolerance (±) N/A 0.037 | O.D. (REF) (inches) N/A 6.145 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 5 3/4 | Nominal O.D. (inches) N/A 6 1/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 145.4 | Metric O.D. (mm) N/A 156.1 |
1-358 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 5.600 | I.D. Tolerance (±) N/A 0.037 | O.D. (REF) (inches) N/A 6.020 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 5 5/8 | Nominal O.D. (inches) N/A 6 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 142.2 | Metric O.D. (mm) N/A 152.9 |
1-357 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 5.475 | I.D. Tolerance (±) N/A 0.037 | O.D. (REF) (inches) N/A 5.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 5 1/2 | Nominal O.D. (inches) N/A 5 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 139.1 | Metric O.D. (mm) N/A 149.7 |
1-356 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 5.350 | I.D. Tolerance (±) N/A 0.037 | O.D. (REF) (inches) N/A 5.770 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 5 3/8 | Nominal O.D. (inches) N/A 5 3/4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 135.9 | Metric O.D. (mm) N/A 146.6 |
1-355 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 5.225 | I.D. Tolerance (±) N/A 0.037 | O.D. (REF) (inches) N/A 5.645 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 5 1/4 | Nominal O.D. (inches) N/A 5 5/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 132.7 | Metric O.D. (mm) N/A 143.4 |
1-354 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 5.100 | I.D. Tolerance (±) N/A 0.037 | O.D. (REF) (inches) N/A 5.520 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 5 1/8 | Nominal O.D. (inches) N/A 5 1/2 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 129.5 | Metric O.D. (mm) N/A 140.2 |
1-353 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 4.975 | I.D. Tolerance (±) N/A 0.037 | O.D. (REF) (inches) N/A 5.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 5 | Nominal O.D. (inches) N/A 5 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 126.4 | Metric O.D. (mm) N/A 137.0 |
1-352 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 4.850 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 5.270 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 4 7/8 | Nominal O.D. (inches) N/A 5 1/4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 123.2 | Metric O.D. (mm) N/A 133.9 |
1-351 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 4.725 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 5.145 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 4 3/4 | Nominal O.D. (inches) N/A 5 1/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 120.0 | Metric O.D. (mm) N/A 130.7 |
1-350 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 4.600 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 5.020 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 4 5/8 | Nominal O.D. (inches) N/A 5 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 116.8 | Metric O.D. (mm) N/A 127.5 |
1-349 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 4.475 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 4.5 | Nominal O.D. (inches) N/A 4 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 113.7 | Metric O.D. (mm) N/A 124.3 |