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) |
---|---|---|---|---|---|---|---|---|---|---|---|
1-233 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 2.859 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.137 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 2 7/8 | Nominal O.D. (inches) N/A 3 1/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 72.6 | Metric O.D. (mm) N/A 79.7 |
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 |
1-410 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 2.600 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 3.150 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 2 5/8 | Nominal O.D. (inches) N/A 3 1/8 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 66.0 | Metric O.D. (mm) N/A 80.0 |
1-151 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 2.987 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.193 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 3 | Nominal O.D. (inches) N/A 3 3/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 75.9 | Metric O.D. (mm) N/A 81.1 |
1-544 | C/S (inches) N/A 0.176 | 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 3.202 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 2 7/8 | Nominal O.D. (inches) N/A 3 3/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 72.4 | Metric O.D. (mm) N/A 81.3 |
1-234 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 2.984 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.262 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 3 | Nominal O.D. (inches) N/A 3 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 75.8 | Metric O.D. (mm) N/A 82.9 |
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 |
1-411 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 2.725 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 3.275 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 2 3/4 | Nominal O.D. (inches) N/A 3 1/4 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 69.2 | Metric O.D. (mm) N/A 83.2 |
1-546 | C/S (inches) N/A 0.176 | 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 3.327 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 3 | Nominal O.D. (inches) N/A 3 5/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 75.6 | Metric O.D. (mm) N/A 84.5 |
1-042 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 3.239 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.379 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 3 1/4 | Nominal O.D. (inches) N/A 3 3/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 82.3 | Metric O.D. (mm) N/A 85.8 |
1-235 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 3.109 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.387 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 3 1/8 | Nominal O.D. (inches) N/A 3 3/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 79.0 | Metric O.D. (mm) N/A 86.0 |
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 |
1-412 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 2.850 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 3.400 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 2 7/8 | Nominal O.D. (inches) N/A 3 3/8 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 72.4 | Metric O.D. (mm) N/A 86.4 |
1-152 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 3.237 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.443 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 3 1/4 | Nominal O.D. (inches) N/A 3 7/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 82.2 | Metric O.D. (mm) N/A 87.5 |
1-548 | C/S (inches) N/A 0.176 | 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 3.452 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 3 1/8 | Nominal O.D. (inches) N/A 3 7/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 78.7 | Metric O.D. (mm) N/A 87.7 |
1-236 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 3.234 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.512 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 3 1/4 | Nominal O.D. (inches) N/A 3 1/2 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 82.1 | Metric O.D. (mm) N/A 89.2 |
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 |
1-413 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 2.975 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.525 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 3 | Nominal O.D. (inches) N/A 3 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 75.6 | Metric O.D. (mm) N/A 89.5 |
1-550 | C/S (inches) N/A 0.176 | 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 3.577 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 3 1/4 | Nominal O.D. (inches) N/A 3 9/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 81.9 | Metric O.D. (mm) N/A 90.9 |
1-043 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 3.489 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.629 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 3 1/2 | Nominal O.D. (inches) N/A 3 5/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 88.6 | Metric O.D. (mm) N/A 92.2 |
1-237 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 3.359 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.637 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 3 3/8 | Nominal O.D. (inches) N/A 3 5/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 85.3 | Metric O.D. (mm) N/A 92.4 |
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 |
1-414 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 3.100 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.650 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 3 1/8 | Nominal O.D. (inches) N/A 3 5/8 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 78.7 | Metric O.D. (mm) N/A 92.7 |
1-153 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 3.487 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.693 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 3 1/2 | Nominal O.D. (inches) N/A 3 11/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 88.6 | Metric O.D. (mm) N/A 93.8 |
1-552 | C/S (inches) N/A 0.176 | 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 3.702 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 3 3/8 | Nominal O.D. (inches) N/A 3 11/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 85.1 | Metric O.D. (mm) N/A 94.0 |