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) |
---|---|---|---|---|---|---|---|---|---|---|---|
1-155 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 3.987 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 4.193 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 4 | Nominal O.D. (inches) N/A 4 3/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 101.3 | Metric O.D. (mm) N/A 106.5 |
1-045 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 3.989 | I.D. Tolerance (±) N/A 0.027 | O.D. (REF) (inches) N/A 4.129 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 4 | Nominal O.D. (inches) N/A 4 1/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 101.3 | Metric O.D. (mm) N/A 104.9 |
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 |
1-422 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 4.100 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 4.650 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 4 1/8 | Nominal O.D. (inches) N/A 4 5/8 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 104.1 | Metric O.D. (mm) N/A 118.1 |
1-563 | C/S (inches) N/A 0.176 | 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 4.452 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 4 1/8 | Nominal O.D. (inches) N/A 4 7/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 104.1 | Metric O.D. (mm) N/A 113.1 |
1-243 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 4.109 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 4.387 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 4 1/8 | Nominal O.D. (inches) N/A 4 3/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 104.4 | Metric O.D. (mm) N/A 111.4 |
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 |
1-423 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 4.225 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.775 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 4 1/4 | Nominal O.D. (inches) N/A 4 3/4 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 107.3 | Metric O.D. (mm) N/A 121.3 |
1-565 | C/S (inches) N/A 0.176 | 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 4.577 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 4 1/4 | Nominal O.D. (inches) N/A 4 9/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 107.3 | Metric O.D. (mm) N/A 116.3 |
1-244 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 4.234 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.512 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 4 1/4 | Nominal O.D. (inches) N/A 4 1/2 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 107.5 | Metric O.D. (mm) N/A 114.6 |
1-156 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 4.237 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.443 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 4 1/4 | Nominal O.D. (inches) N/A 4 7/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 107.6 | Metric O.D. (mm) N/A 112.9 |
1-046 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 4.239 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.379 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 4 1/4 | Nominal O.D. (inches) N/A 4 3/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 107.7 | Metric O.D. (mm) N/A 111.2 |
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 |
1-424 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 4.350 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.900 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 4 3/8 | Nominal O.D. (inches) N/A 4 7/8 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 110.5 | Metric O.D. (mm) N/A 124.5 |
1-566 | C/S (inches) N/A 0.176 | 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 4.702 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 4 3/8 | Nominal O.D. (inches) N/A 4 11/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 110.5 | Metric O.D. (mm) N/A 119.4 |
1-245 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 4.359 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.637 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 4 3/8 | Nominal O.D. (inches) N/A 4 5/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 110.7 | Metric O.D. (mm) N/A 117.8 |
1-349 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 4.475 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 4.5 | Nominal O.D. (inches) N/A 4 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 113.7 | Metric O.D. (mm) N/A 124.3 |
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 |
1-568 | C/S (inches) N/A 0.176 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 4.475 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.827 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 4.5 | Nominal O.D. (inches) N/A 4 13/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 113.7 | Metric O.D. (mm) N/A 122.6 |
1-246 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 4.484 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.762 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 4.5 | Nominal O.D. (inches) N/A 4 3/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 113.9 | Metric O.D. (mm) N/A 121.0 |
1-157 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 4.487 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.693 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 4.5 | Nominal O.D. (inches) N/A 4 11/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 114.0 | Metric O.D. (mm) N/A 119.2 |
1-047 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 4.489 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.629 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 4.5 | Nominal O.D. (inches) N/A 4 5/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 114.0 | Metric O.D. (mm) N/A 117.6 |
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 |
1-426 | 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 |
1-569 | 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 |