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) |
---|---|---|---|---|---|---|---|---|---|---|---|
1-308 | 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 |
1-309 | 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 |
1-310 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 0.475 | I.D. Tolerance (±) N/A 0.005 | O.D. (REF) (inches) N/A 0.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1/2 | Nominal O.D. (inches) N/A 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 12.1 | Metric O.D. (mm) N/A 22.7 |
1-311 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 0.537 | I.D. Tolerance (±) N/A 0.007 | O.D. (REF) (inches) N/A 0.959 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 9/16 | Nominal O.D. (inches) N/A 15/16 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 13.6 | Metric O.D. (mm) N/A 24.4 |
1-312 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 0.600 | I.D. Tolerance (±) N/A 0.009 | O.D. (REF) (inches) N/A 1.022 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 5/8 | Nominal O.D. (inches) N/A 1 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 15.2 | Metric O.D. (mm) N/A 26.0 |
1-313 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 0.662 | I.D. Tolerance (±) N/A 0.009 | O.D. (REF) (inches) N/A 1.084 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 11/16 | Nominal O.D. (inches) N/A 1 1/16 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 16.8 | Metric O.D. (mm) N/A 27.5 |
1-314 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 0.725 | I.D. Tolerance (±) N/A 0.010 | O.D. (REF) (inches) N/A 1.147 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 3/4 | Nominal O.D. (inches) N/A 1 1/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 18.4 | Metric O.D. (mm) N/A 29.1 |
1-315 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 0.787 | I.D. Tolerance (±) N/A 0.010 | O.D. (REF) (inches) N/A 1.209 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 13/16 | Nominal O.D. (inches) N/A 1 3/16 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 20.0 | Metric O.D. (mm) N/A 30.7 |
1-316 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 0.850 | I.D. Tolerance (±) N/A 0.010 | O.D. (REF) (inches) N/A 1.270 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 7/8 | Nominal O.D. (inches) N/A 1 1/4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 21.6 | Metric O.D. (mm) N/A 32.3 |
1-317 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 0.912 | I.D. Tolerance (±) N/A 0.010 | O.D. (REF) (inches) N/A 1.334 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 15/16 | Nominal O.D. (inches) N/A 1 5/16 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 23.2 | Metric O.D. (mm) N/A 33.9 |
1-318 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 0.975 | I.D. Tolerance (±) N/A 0.010 | O.D. (REF) (inches) N/A 1.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 | Nominal O.D. (inches) N/A 1 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 24.8 | Metric O.D. (mm) N/A 35.4 |
1-319 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.037 | I.D. Tolerance (±) N/A 0.010 | O.D. (REF) (inches) N/A 1.457 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 1/16 | Nominal O.D. (inches) N/A 1 7/16 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 26.3 | Metric O.D. (mm) N/A 37.0 |
1-320 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.100 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.520 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 1/8 | Nominal O.D. (inches) N/A 1 1/2 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 27.9 | Metric O.D. (mm) N/A 38.6 |
1-321 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.162 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.582 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 3/16 | Nominal O.D. (inches) N/A 1 9/16 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 29.5 | Metric O.D. (mm) N/A 40.2 |
1-322 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.225 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.645 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 1/4 | Nominal O.D. (inches) N/A 1 5/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 31.1 | Metric O.D. (mm) N/A 41.8 |
1-323 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.287 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.707 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 5/16 | Nominal O.D. (inches) N/A 1 11/16 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 32.7 | Metric O.D. (mm) N/A 43.4 |
1-324 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.350 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.770 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 3/8 | Nominal O.D. (inches) N/A 1 3/4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 34.3 | Metric O.D. (mm) N/A 45.0 |
1-325 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.475 | I.D. Tolerance (±) N/A 0.015 | O.D. (REF) (inches) N/A 1.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 1/2 | Nominal O.D. (inches) N/A 1 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 37.5 | Metric O.D. (mm) N/A 48.1 |
1-326 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.600 | I.D. Tolerance (±) N/A 0.015 | O.D. (REF) (inches) N/A 2.020 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 5/8 | Nominal O.D. (inches) N/A 2 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 40.6 | Metric O.D. (mm) N/A 51.3 |
1-327 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.725 | I.D. Tolerance (±) N/A 0.015 | O.D. (REF) (inches) N/A 2.145 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 3/4 | Nominal O.D. (inches) N/A 2 1/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 43.8 | Metric O.D. (mm) N/A 54.5 |
1-328 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.850 | I.D. Tolerance (±) N/A 0.015 | O.D. (REF) (inches) N/A 2.270 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 7/8 | Nominal O.D. (inches) N/A 2 1/4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 47.0 | Metric O.D. (mm) N/A 57.7 |
1-329 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.975 | I.D. Tolerance (±) N/A 0.018 | O.D. (REF) (inches) N/A 2.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 2 | Nominal O.D. (inches) N/A 2 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 50.2 | Metric O.D. (mm) N/A 60.8 |
1-330 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 2.100 | I.D. Tolerance (±) N/A 0.018 | O.D. (REF) (inches) N/A 2.520 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 2 1/8 | Nominal O.D. (inches) N/A 2 1/2 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 53.3 | Metric O.D. (mm) N/A 64.0 |
1-331 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 2.225 | I.D. Tolerance (±) N/A 0.018 | O.D. (REF) (inches) N/A 2.645 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 2 1/4 | Nominal O.D. (inches) N/A 2 5/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 56.5 | Metric O.D. (mm) N/A 67.2 |
1-332 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 2.350 | I.D. Tolerance (±) N/A 0.018 | O.D. (REF) (inches) N/A 2.770 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 2 3/8 | Nominal O.D. (inches) N/A 2 3/4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 59.7 | Metric O.D. (mm) N/A 70.4 |