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) |
---|---|---|---|---|---|---|---|---|---|---|---|
1-348 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 4.350 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.770 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 4 3/8 | Nominal O.D. (inches) N/A 4 3/4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 110.5 | Metric O.D. (mm) N/A 121.2 |
1-347 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 4.225 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.645 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 4 1/4 | Nominal O.D. (inches) N/A 4 5/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 107.3 | Metric O.D. (mm) N/A 118.0 |
1-346 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 4.100 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 4.520 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 4 1/8 | Nominal O.D. (inches) N/A 4 1/2 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 104.1 | Metric O.D. (mm) N/A 114.8 |
1-345 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 3.975 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 4.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 4 | Nominal O.D. (inches) N/A 4 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 101.0 | Metric O.D. (mm) N/A 111.6 |
1-344 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 3.850 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 4.270 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 3 7/8 | Nominal O.D. (inches) N/A 4 1/4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 97.8 | Metric O.D. (mm) N/A 108.5 |
1-343 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 3.725 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 4.145 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 3 3/4 | Nominal O.D. (inches) N/A 4 1/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 94.6 | Metric O.D. (mm) N/A 105.3 |
1-342 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 3.600 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 4.020 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 3 5/8 | Nominal O.D. (inches) N/A 4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 91.4 | Metric O.D. (mm) N/A 102.1 |
1-341 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 3.475 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 3 1/2 | Nominal O.D. (inches) N/A 3 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 88.3 | Metric O.D. (mm) N/A 98.9 |
1-340 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 3.350 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.770 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 3 3/8 | Nominal O.D. (inches) N/A 3 3/4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 85.1 | Metric O.D. (mm) N/A 95.8 |
1-339 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 3.225 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.645 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 3 1/4 | Nominal O.D. (inches) N/A 3 5/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 81.9 | Metric O.D. (mm) N/A 92.6 |
1-338 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 3.100 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.520 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 3 1/8 | Nominal O.D. (inches) N/A 3 1/2 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 78.7 | Metric O.D. (mm) N/A 89.4 |
1-337 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 2.975 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 3 | Nominal O.D. (inches) N/A 3 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 75.6 | Metric O.D. (mm) N/A 86.2 |
1-336 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 2.850 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 3.270 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 2 7/8 | Nominal O.D. (inches) N/A 3 1/4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 72.4 | Metric O.D. (mm) N/A 83.1 |
1-335 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 2.725 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 3.145 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 2 3/4 | Nominal O.D. (inches) N/A 3 1/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 69.2 | Metric O.D. (mm) N/A 79.9 |
1-334 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 2.600 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 3.020 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 2 5/8 | Nominal O.D. (inches) N/A 3 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 66.0 | Metric O.D. (mm) N/A 76.7 |
1-333 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 2.475 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 2.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 2 1/2 | Nominal O.D. (inches) N/A 2 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 62.9 | Metric O.D. (mm) N/A 73.5 |
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 |
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 |
1-330 | 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 |
1-329 | 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 |
1-328 | 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 |
1-327 | 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 |
1-326 | 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 |
1-325 | 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 |
1-324 | 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 |