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) |
---|---|---|---|---|---|---|---|---|---|---|---|
1-238 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 3.484 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.762 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 3 1/2 | Nominal O.D. (inches) N/A 3 3/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 88.5 | Metric O.D. (mm) N/A 95.6 |
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 |
1-415 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 3.225 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.775 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 3 1/4 | Nominal O.D. (inches) N/A 3 3/4 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 81.9 | Metric O.D. (mm) N/A 95.9 |
1-554 | C/S (inches) N/A 0.176 | 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 3.827 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 3 1/2 | Nominal O.D. (inches) N/A 3 13/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 88.3 | Metric O.D. (mm) N/A 97.2 |
1-044 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 3.739 | I.D. Tolerance (±) N/A 0.027 | O.D. (REF) (inches) N/A 3.879 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 3 3/4 | Nominal O.D. (inches) N/A 3 7/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 95.0 | Metric O.D. (mm) N/A 98.5 |
1-239 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 3.609 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 3.887 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 3 5/8 | Nominal O.D. (inches) N/A 3 7/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 91.7 | Metric O.D. (mm) N/A 98.7 |
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 |
1-416 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 3.350 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.900 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 3 3/8 | Nominal O.D. (inches) N/A 3 7/8 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 85.1 | Metric O.D. (mm) N/A 99.1 |
1-154 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 3.737 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 3.943 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 3 3/4 | Nominal O.D. (inches) N/A 3 15/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 94.9 | Metric O.D. (mm) N/A 100.2 |
1-556 | C/S (inches) N/A 0.176 | 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 3.952 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 3 5/8 | Nominal O.D. (inches) N/A 3 15/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 91.4 | Metric O.D. (mm) N/A 100.4 |
1-240 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 3.734 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 4.012 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 3 3/4 | Nominal O.D. (inches) N/A 4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 94.8 | Metric O.D. (mm) N/A 101.9 |
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 |
1-417 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 3.475 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 4.025 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 3 1/2 | Nominal O.D. (inches) N/A 4 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 88.3 | Metric O.D. (mm) N/A 102.2 |
1-558 | C/S (inches) N/A 0.176 | 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 4.077 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 3 3/4 | Nominal O.D. (inches) N/A 4 1/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 94.6 | Metric O.D. (mm) N/A 103.6 |
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 |
1-241 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 3.859 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 4.137 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 3 7/8 | Nominal O.D. (inches) N/A 4 1/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 98.0 | Metric O.D. (mm) N/A 105.1 |
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 |
1-418 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 3.600 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 4.150 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 3 5/8 | Nominal O.D. (inches) N/A 4 1/8 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 91.4 | Metric O.D. (mm) N/A 105.4 |
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 |
1-560 | C/S (inches) N/A 0.176 | 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 4.202 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 3 7/8 | Nominal O.D. (inches) N/A 4 3/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 97.8 | Metric O.D. (mm) N/A 106.7 |
1-242 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 3.984 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 4.262 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 4 | Nominal O.D. (inches) N/A 4 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 101.2 | Metric O.D. (mm) N/A 108.3 |
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 |
1-419 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 3.725 | I.D. Tolerance (±) N/A 0.028 | O.D. (REF) (inches) N/A 4.275 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 3 3/4 | Nominal O.D. (inches) N/A 4 1/4 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 94.6 | Metric O.D. (mm) N/A 108.6 |
1-562 | C/S (inches) N/A 0.176 | 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 4.327 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 4 | Nominal O.D. (inches) N/A 4 5/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 101.0 | Metric O.D. (mm) N/A 109.9 |
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 |