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) |
---|---|---|---|---|---|---|---|---|---|---|---|
1-309 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 0.412 | I.D. Tolerance (±) N/A 0.005 | O.D. (REF) (inches) N/A 0.832 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 7/16 | Nominal O.D. (inches) N/A 13/16 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 10.5 | Metric O.D. (mm) N/A 21.1 |
1-308 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 0.350 | I.D. Tolerance (±) N/A 0.005 | O.D. (REF) (inches) N/A 0.770 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 3/8 | Nominal O.D. (inches) N/A 3/4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 8.9 | Metric O.D. (mm) N/A 19.6 |
1-932 | C/S (inches) N/A 0.118 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 2.337 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 2.573 | Nominal C/S (inches) N/A | Nominal I.D. (inches) N/A | Nominal O.D. (inches) N/A | Metric C/S (mm) N/A 3.0 | Metric I.D. (mm) N/A 59.4 | Metric O.D. (mm) N/A 65.4 |
1-928 | C/S (inches) N/A 0.118 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 2.090 | I.D. Tolerance (±) N/A 0.018 | O.D. (REF) (inches) N/A 2.326 | Nominal C/S (inches) N/A | Nominal I.D. (inches) N/A | Nominal O.D. (inches) N/A | Metric C/S (mm) N/A 3.0 | Metric I.D. (mm) N/A 53.1 | Metric O.D. (mm) N/A 59.1 |
1-924 | C/S (inches) N/A 0.118 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 1.720 | I.D. Tolerance (±) N/A 0.015 | O.D. (REF) (inches) N/A 1.956 | Nominal C/S (inches) N/A | Nominal I.D. (inches) N/A | Nominal O.D. (inches) N/A | Metric C/S (mm) N/A 3.0 | Metric I.D. (mm) N/A 43.7 | Metric O.D. (mm) N/A 49.7 |
1-920 | C/S (inches) N/A 0.118 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 1.475 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.711 | Nominal C/S (inches) N/A | Nominal I.D. (inches) N/A | Nominal O.D. (inches) N/A | Metric C/S (mm) N/A 3.0 | Metric I.D. (mm) N/A 37.5 | Metric O.D. (mm) N/A 43.5 |
1-918 | C/S (inches) N/A 0.116 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 1.355 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.587 | Nominal C/S (inches) N/A | Nominal I.D. (inches) N/A | Nominal O.D. (inches) N/A | Metric C/S (mm) N/A 2.9 | Metric I.D. (mm) N/A 34.4 | Metric O.D. (mm) N/A 40.3 |
1-916 | C/S (inches) N/A 0.116 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 1.171 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.403 | Nominal C/S (inches) N/A | Nominal I.D. (inches) N/A | Nominal O.D. (inches) N/A | Metric C/S (mm) N/A 2.9 | Metric I.D. (mm) N/A 29.7 | Metric O.D. (mm) N/A 35.6 |
1-915 | C/S (inches) N/A 0.116 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 1.109 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.341 | Nominal C/S (inches) N/A | Nominal I.D. (inches) N/A | Nominal O.D. (inches) N/A | Metric C/S (mm) N/A 2.9 | Metric I.D. (mm) N/A 28.2 | Metric O.D. (mm) N/A 34.1 |
1-914 | C/S (inches) N/A 0.116 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 1.047 | I.D. Tolerance (±) N/A 0.010 | O.D. (REF) (inches) N/A 1.279 | Nominal C/S (inches) N/A | Nominal I.D. (inches) N/A | Nominal O.D. (inches) N/A | Metric C/S (mm) N/A 2.9 | Metric I.D. (mm) N/A 26.6 | Metric O.D. (mm) N/A 32.5 |
1-913 | C/S (inches) N/A 0.116 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 0.986 | I.D. Tolerance (±) N/A 0.010 | O.D. (REF) (inches) N/A 1.218 | Nominal C/S (inches) N/A | Nominal I.D. (inches) N/A | Nominal O.D. (inches) N/A | Metric C/S (mm) N/A 2.9 | Metric I.D. (mm) N/A 25.0 | Metric O.D. (mm) N/A 30.9 |
1-912 | C/S (inches) N/A 0.116 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 0.924 | I.D. Tolerance (±) N/A 0.010 | O.D. (REF) (inches) N/A 1.156 | Nominal C/S (inches) N/A | Nominal I.D. (inches) N/A | Nominal O.D. (inches) N/A | Metric C/S (mm) N/A 2.9 | Metric I.D. (mm) N/A 23.5 | Metric O.D. (mm) N/A 29.4 |
1-911 | C/S (inches) N/A 0.116 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 0.863 | I.D. Tolerance (±) N/A 0.010 | O.D. (REF) (inches) N/A 1.095 | Nominal C/S (inches) N/A | Nominal I.D. (inches) N/A | Nominal O.D. (inches) N/A | Metric C/S (mm) N/A 2.9 | Metric I.D. (mm) N/A 21.9 | Metric O.D. (mm) N/A 27.8 |
1-286 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 19.960 | I.D. Tolerance (±) N/A 0.090 | O.D. (REF) (inches) N/A 20.238 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 20 | Nominal O.D. (inches) N/A 20 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 507.0 | Metric O.D. (mm) N/A 514.0 |
1-284 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 17.955 | I.D. Tolerance (±) N/A 0.085 | O.D. (REF) (inches) N/A 18.233 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 18 | Nominal O.D. (inches) N/A 18 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 456.1 | Metric O.D. (mm) N/A 463.1 |
1-283 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 16.955 | I.D. Tolerance (±) N/A 0.080 | O.D. (REF) (inches) N/A 17.233 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 17 | Nominal O.D. (inches) N/A 17 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 430.7 | Metric O.D. (mm) N/A 437.7 |
1-282 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 15.955 | I.D. Tolerance (±) N/A 0.075 | O.D. (REF) (inches) N/A 16.233 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 16 | Nominal O.D. (inches) N/A 16 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 405.3 | Metric O.D. (mm) N/A 412.3 |
1-281 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 14.984 | I.D. Tolerance (±) N/A 0.065 | O.D. (REF) (inches) N/A 15.262 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 15 | Nominal O.D. (inches) N/A 15 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 380.6 | Metric O.D. (mm) N/A 387.7 |
1-280 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 13.984 | I.D. Tolerance (±) N/A 0.065 | O.D. (REF) (inches) N/A 14.262 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 14 | Nominal O.D. (inches) N/A 14 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 355.2 | Metric O.D. (mm) N/A 362.3 |
1-279 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 12.984 | I.D. Tolerance (±) N/A 0.065 | O.D. (REF) (inches) N/A 13.262 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 13 | Nominal O.D. (inches) N/A 13 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 329.8 | Metric O.D. (mm) N/A 336.9 |
1-278 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 11.984 | I.D. Tolerance (±) N/A 0.065 | O.D. (REF) (inches) N/A 12.262 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 12 | Nominal O.D. (inches) N/A 12 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 304.4 | Metric O.D. (mm) N/A 311.5 |
1-277 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 11.484 | I.D. Tolerance (±) N/A 0.065 | O.D. (REF) (inches) N/A 11.762 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 11 1/2 | Nominal O.D. (inches) N/A 11 3/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 291.7 | Metric O.D. (mm) N/A 298.8 |
1-276 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 10.984 | I.D. Tolerance (±) N/A 0.065 | O.D. (REF) (inches) N/A 11.262 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 11 | Nominal O.D. (inches) N/A 11 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 279.0 | Metric O.D. (mm) N/A 286.1 |
1-275 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 10.484 | I.D. Tolerance (±) N/A 0.055 | O.D. (REF) (inches) N/A 10.762 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 10 1/2 | Nominal O.D. (inches) N/A 10 3/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 266.3 | Metric O.D. (mm) N/A 273.4 |
1-274 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 9.984 | I.D. Tolerance (±) N/A 0.055 | O.D. (REF) (inches) N/A 10.262 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 10 | Nominal O.D. (inches) N/A 10 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 253.6 | Metric O.D. (mm) N/A 260.7 |