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) |
---|---|---|---|---|---|---|---|---|---|---|---|
1-401 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 1.475 | I.D. Tolerance (±) N/A 0.015 | O.D. (REF) (inches) N/A 2.025 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 1 1/2 | Nominal O.D. (inches) N/A 2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 37.5 | Metric O.D. (mm) N/A 51.4 |
1-400 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 1.350 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.900 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 1 3/8 | Nominal O.D. (inches) N/A 1 7/8 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 34.3 | Metric O.D. (mm) N/A 48.3 |
1-396 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 26.940 | I.D. Tolerance (±) N/A 0.120 | O.D. (REF) (inches) N/A 27.360 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 27 | Nominal O.D. (inches) N/A 27 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 684.3 | Metric O.D. (mm) N/A 695.0 |
1-395 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 25.940 | I.D. Tolerance (±) N/A 0.120 | O.D. (REF) (inches) N/A 26.360 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 26 | Nominal O.D. (inches) N/A 26 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 658.9 | Metric O.D. (mm) N/A 669.5 |
1-394 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 24.940 | I.D. Tolerance (±) N/A 0.115 | O.D. (REF) (inches) N/A 25.360 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 25 | Nominal O.D. (inches) N/A 25 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 633.5 | Metric O.D. (mm) N/A 644.1 |
1-393 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 23.940 | I.D. Tolerance (±) N/A 0.110 | O.D. (REF) (inches) N/A 24.360 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 24 | Nominal O.D. (inches) N/A 24 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 608.1 | Metric O.D. (mm) N/A 618.7 |
1-392 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 22.940 | I.D. Tolerance (±) N/A 0.105 | O.D. (REF) (inches) N/A 23.360 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 23 | Nominal O.D. (inches) N/A 23 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 582.7 | Metric O.D. (mm) N/A 593.3 |
1-391 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 21.955 | I.D. Tolerance (±) N/A 0.095 | O.D. (REF) (inches) N/A 22.415 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 22 | Nominal O.D. (inches) N/A 22 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 557.7 | Metric O.D. (mm) N/A 569.3 |
1-390 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 20.955 | I.D. Tolerance (±) N/A 0.095 | O.D. (REF) (inches) N/A 21.375 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 21 | Nominal O.D. (inches) N/A 21 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 532.3 | Metric O.D. (mm) N/A 542.9 |
1-389 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 19.955 | I.D. Tolerance (±) N/A 0.095 | O.D. (REF) (inches) N/A 20.375 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 20 | Nominal O.D. (inches) N/A 20 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 506.9 | Metric O.D. (mm) N/A 517.5 |
1-388 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 18.955 | I.D. Tolerance (±) N/A 0.090 | O.D. (REF) (inches) N/A 19.375 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 19 | Nominal O.D. (inches) N/A 19 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 481.5 | Metric O.D. (mm) N/A 492.1 |
1-387 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 17.955 | I.D. Tolerance (±) N/A 0.085 | O.D. (REF) (inches) N/A 18.375 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 18 | Nominal O.D. (inches) N/A 18 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 456.1 | Metric O.D. (mm) N/A 466.7 |
1-386 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 16.955 | I.D. Tolerance (±) N/A 0.080 | O.D. (REF) (inches) N/A 17.375 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 17 | Nominal O.D. (inches) N/A 17 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 430.7 | Metric O.D. (mm) N/A 441.3 |
1-385 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 15.955 | I.D. Tolerance (±) N/A 0.070 | O.D. (REF) (inches) N/A 16.375 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 16 | Nominal O.D. (inches) N/A 16 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 405.3 | Metric O.D. (mm) N/A 415.9 |
1-384 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 14.975 | I.D. Tolerance (±) N/A 0.070 | O.D. (REF) (inches) N/A 15.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 15 | Nominal O.D. (inches) N/A 15 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 380.4 | Metric O.D. (mm) N/A 391.0 |
1-383 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 13.975 | I.D. Tolerance (±) N/A 0.070 | O.D. (REF) (inches) N/A 14.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 14 | Nominal O.D. (inches) N/A 14 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 355.0 | Metric O.D. (mm) N/A 365.6 |
1-382 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 12.975 | I.D. Tolerance (±) N/A 0.065 | O.D. (REF) (inches) N/A 13.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 13 | Nominal O.D. (inches) N/A 13 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 329.6 | Metric O.D. (mm) N/A 340.2 |
1-381 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 11.975 | I.D. Tolerance (±) N/A 0.065 | O.D. (REF) (inches) N/A 12.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 12 | Nominal O.D. (inches) N/A 12 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 304.2 | Metric O.D. (mm) N/A 314.8 |
1-380 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 11.475 | I.D. Tolerance (±) N/A 0.065 | O.D. (REF) (inches) N/A 11.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 11 1/2 | Nominal O.D. (inches) N/A 11 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 291.5 | Metric O.D. (mm) N/A 302.1 |
1-379 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 10.975 | I.D. Tolerance (±) N/A 0.060 | O.D. (REF) (inches) N/A 11.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 11 | Nominal O.D. (inches) N/A 11 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 278.8 | Metric O.D. (mm) N/A 289.4 |
1-378 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 10.475 | I.D. Tolerance (±) N/A 0.060 | O.D. (REF) (inches) N/A 10.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 10 1/2 | Nominal O.D. (inches) N/A 10 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 266.1 | Metric O.D. (mm) N/A 276.7 |
1-377 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 9.975 | I.D. Tolerance (±) N/A 0.055 | O.D. (REF) (inches) N/A 10.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 10 | Nominal O.D. (inches) N/A 10 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 253.4 | Metric O.D. (mm) N/A 264.0 |
1-376 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 9.725 | I.D. Tolerance (±) N/A 0.055 | O.D. (REF) (inches) N/A 10.145 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 9 3/4 | Nominal O.D. (inches) N/A 10 1/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 247.0 | Metric O.D. (mm) N/A 257.7 |
1-375 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 9.475 | I.D. Tolerance (±) N/A 0.055 | O.D. (REF) (inches) N/A 9.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 9 1/2 | Nominal O.D. (inches) N/A 9 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 240.7 | Metric O.D. (mm) N/A 251.3 |
1-374 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 9.225 | I.D. Tolerance (±) N/A 0.055 | O.D. (REF) (inches) N/A 9.645 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 9 1/4 | Nominal O.D. (inches) N/A 9 5/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 234.3 | Metric O.D. (mm) N/A 245.0 |