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) |
---|---|---|---|---|---|---|---|---|---|---|---|
1-253 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 5.359 | I.D. Tolerance (±) N/A 0.035 | O.D. (REF) (inches) N/A 5.637 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 5 3/8 | Nominal O.D. (inches) N/A 5 5/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 136.1 | Metric O.D. (mm) N/A 143.2 |
1-051 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 5.489 | I.D. Tolerance (±) N/A 0.037 | O.D. (REF) (inches) N/A 5.629 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 5 1/2 | Nominal O.D. (inches) N/A 5 5/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 139.4 | Metric O.D. (mm) N/A 143.0 |
1-429 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 4.975 | I.D. Tolerance (±) N/A 0.037 | O.D. (REF) (inches) N/A 5.525 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 5 | Nominal O.D. (inches) N/A 5 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 126.4 | Metric O.D. (mm) N/A 140.3 |
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 |
1-252 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 5.234 | I.D. Tolerance (±) N/A 0.035 | O.D. (REF) (inches) N/A 5.512 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 5 1/4 | Nominal O.D. (inches) N/A 5 1/2 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 132.9 | Metric O.D. (mm) N/A 140.0 |
1-160 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 5.237 | I.D. Tolerance (±) N/A 0.035 | O.D. (REF) (inches) N/A 5.443 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 5 1/4 | Nominal O.D. (inches) N/A 5 7/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 133.0 | Metric O.D. (mm) N/A 138.3 |
1-428 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 4.850 | I.D. Tolerance (±) N/A 0.033 | O.D. (REF) (inches) N/A 5.400 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 4 7/8 | Nominal O.D. (inches) N/A 5 3/8 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 123.2 | Metric O.D. (mm) N/A 137.2 |
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 |
1-251 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 5.109 | I.D. Tolerance (±) N/A 0.035 | O.D. (REF) (inches) N/A 5.387 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 5 1/8 | Nominal O.D. (inches) N/A 5 3/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 129.8 | Metric O.D. (mm) N/A 136.8 |
1-050 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 5.239 | I.D. Tolerance (±) N/A 0.037 | O.D. (REF) (inches) N/A 5.379 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 5 1/4 | Nominal O.D. (inches) N/A 5 3/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 133.1 | Metric O.D. (mm) N/A 136.6 |
1-427 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 4.725 | I.D. Tolerance (±) N/A 0.033 | O.D. (REF) (inches) N/A 5.275 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 4 3/4 | Nominal O.D. (inches) N/A 5 1/4 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 120.0 | Metric O.D. (mm) N/A 134.0 |
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 |
1-250 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 4.984 | I.D. Tolerance (±) N/A 0.035 | O.D. (REF) (inches) N/A 5.262 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 5 | Nominal O.D. (inches) N/A 5 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 126.6 | Metric O.D. (mm) N/A 133.7 |
1-572 | C/S (inches) N/A 0.176 | 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 5.202 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 4 7/8 | Nominal O.D. (inches) N/A 5 3/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 123.2 | Metric O.D. (mm) N/A 132.1 |
1-159 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 4.987 | I.D. Tolerance (±) N/A 0.035 | O.D. (REF) (inches) N/A 5.193 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 5 | Nominal O.D. (inches) N/A 5 3/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 126.7 | Metric O.D. (mm) N/A 131.9 |
1-426 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 4.600 | I.D. Tolerance (±) N/A 0.033 | O.D. (REF) (inches) N/A 5.150 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 4 5/8 | Nominal O.D. (inches) N/A 5 1/8 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 116.8 | Metric O.D. (mm) N/A 130.8 |
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 |
1-249 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 4.859 | I.D. Tolerance (±) N/A 0.035 | O.D. (REF) (inches) N/A 5.137 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 4 7/8 | Nominal O.D. (inches) N/A 5 1/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 123.4 | Metric O.D. (mm) N/A 130.5 |
1-049 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 4.989 | I.D. Tolerance (±) N/A 0.037 | O.D. (REF) (inches) N/A 5.129 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 5 | Nominal O.D. (inches) N/A 5 1/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 126.7 | Metric O.D. (mm) N/A 130.3 |
1-571 | C/S (inches) N/A 0.176 | 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 5.077 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 4 3/4 | Nominal O.D. (inches) N/A 5 1/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 120.0 | Metric O.D. (mm) N/A 129.0 |
1-425 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 4.475 | I.D. Tolerance (±) N/A 0.033 | O.D. (REF) (inches) N/A 5.025 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 4.5 | Nominal O.D. (inches) N/A 5 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 113.7 | Metric O.D. (mm) N/A 127.6 |
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 |
1-248 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 4.734 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 5.012 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 4 3/4 | Nominal O.D. (inches) N/A 5 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 120.2 | Metric O.D. (mm) N/A 127.3 |
1-569 | C/S (inches) N/A 0.176 | 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 4.952 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 4 5/8 | Nominal O.D. (inches) N/A 4 15/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 116.8 | Metric O.D. (mm) N/A 125.8 |
1-158 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 4.737 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.943 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 4 3/4 | Nominal O.D. (inches) N/A 4 15/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 120.3 | Metric O.D. (mm) N/A 125.6 |