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) |
---|---|---|---|---|---|---|---|---|---|---|---|
1-174 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 8.737 | I.D. Tolerance (±) N/A 0.050 | O.D. (REF) (inches) N/A 8.943 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 8 3/4 | Nominal O.D. (inches) N/A 8 15/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 221.9 | Metric O.D. (mm) N/A 227.2 |
1-269 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 8.734 | I.D. Tolerance (±) N/A 0.050 | O.D. (REF) (inches) N/A 9.012 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 8 3/4 | Nominal O.D. (inches) N/A 9 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 221.8 | Metric O.D. (mm) N/A 228.9 |
1-372 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 8.725 | I.D. Tolerance (±) N/A 0.050 | O.D. (REF) (inches) N/A 9.145 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 8 3/4 | Nominal O.D. (inches) N/A 9 1/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 221.6 | Metric O.D. (mm) N/A 232.3 |
1-173 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 8.487 | I.D. Tolerance (±) N/A 0.050 | O.D. (REF) (inches) N/A 8.693 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 8 1/2 | Nominal O.D. (inches) N/A 8 11/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 215.6 | Metric O.D. (mm) N/A 220.8 |
1-268 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 8.484 | I.D. Tolerance (±) N/A 0.050 | O.D. (REF) (inches) N/A 8.762 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 8 1/2 | Nominal O.D. (inches) N/A 8 3/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 215.5 | Metric O.D. (mm) N/A 222.6 |
1-446 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 8.475 | I.D. Tolerance (±) N/A 0.055 | O.D. (REF) (inches) N/A 9.025 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 8 1/2 | Nominal O.D. (inches) N/A 9 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 215.3 | Metric O.D. (mm) N/A 229.2 |
1-371 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 8.475 | I.D. Tolerance (±) N/A 0.050 | O.D. (REF) (inches) N/A 8.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 8 1/2 | Nominal O.D. (inches) N/A 8 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 215.3 | Metric O.D. (mm) N/A 225.9 |
1-172 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 8.237 | I.D. Tolerance (±) N/A 0.050 | O.D. (REF) (inches) N/A 8.443 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 8 1/4 | Nominal O.D. (inches) N/A 8 7/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 209.2 | Metric O.D. (mm) N/A 214.5 |
1-267 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 8.234 | I.D. Tolerance (±) N/A 0.050 | O.D. (REF) (inches) N/A 8.512 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 8 1/4 | Nominal O.D. (inches) N/A 8 1/2 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 209.1 | Metric O.D. (mm) N/A 216.2 |
1-370 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 8.225 | I.D. Tolerance (±) N/A 0.050 | O.D. (REF) (inches) N/A 8.645 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 8 1/4 | Nominal O.D. (inches) N/A 8 5/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 208.9 | Metric O.D. (mm) N/A 219.6 |
1-061 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 7.989 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 8.129 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 8 | Nominal O.D. (inches) N/A 8 1/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 202.9 | Metric O.D. (mm) N/A 206.5 |
1-171 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 7.987 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 8.193 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 8 | Nominal O.D. (inches) N/A 8 3/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 202.9 | Metric O.D. (mm) N/A 208.1 |
1-266 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 7.984 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 8.262 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 8 | Nominal O.D. (inches) N/A 8 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 202.8 | Metric O.D. (mm) N/A 209.9 |
1-445 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 7.975 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 8.525 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 8 | Nominal O.D. (inches) N/A 8 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 202.6 | Metric O.D. (mm) N/A 216.5 |
1-369 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 7.975 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 8.395 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 8 | Nominal O.D. (inches) N/A 8 3/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 202.6 | Metric O.D. (mm) N/A 213.2 |
1-060 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 7.739 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 7.879 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 7 3/4 | Nominal O.D. (inches) N/A 7 7/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 196.6 | Metric O.D. (mm) N/A 200.1 |
1-170 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 7.737 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 7.943 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 7 3/4 | Nominal O.D. (inches) N/A 7 15/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 196.5 | Metric O.D. (mm) N/A 201.8 |
1-265 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 7.734 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 8.012 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 7 3/4 | Nominal O.D. (inches) N/A 8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 196.4 | Metric O.D. (mm) N/A 203.5 |
1-444 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 7.725 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 8.275 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 7 3/4 | Nominal O.D. (inches) N/A 8 1/4 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 196.2 | Metric O.D. (mm) N/A 210.2 |
1-368 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 7.725 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 8.145 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 7 3/4 | Nominal O.D. (inches) N/A 8 1/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 196.2 | Metric O.D. (mm) N/A 206.9 |
1-059 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 7.489 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 7.629 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 7 1/4 | Nominal O.D. (inches) N/A 7 5/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 190.2 | Metric O.D. (mm) N/A 193.8 |
1-169 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 7.487 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 7.693 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 7 1/4 | Nominal O.D. (inches) N/A 7 11/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 190.2 | Metric O.D. (mm) N/A 195.4 |
1-264 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 7.484 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 7.762 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 7 1/4 | Nominal O.D. (inches) N/A 7 3/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 190.1 | Metric O.D. (mm) N/A 197.2 |
1-443 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 7.475 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 8.025 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 7 1/2 | Nominal O.D. (inches) N/A 8 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 189.9 | Metric O.D. (mm) N/A 203.8 |
1-367 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 7.475 | I.D. Tolerance (±) N/A 0.045 | O.D. (REF) (inches) N/A 7.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 7 1/4 | Nominal O.D. (inches) N/A 7 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 189.9 | Metric O.D. (mm) N/A 200.5 |