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) |
---|---|---|---|---|---|---|---|---|---|---|---|
1-226 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 1.984 | I.D. Tolerance (±) N/A 0.018 | O.D. (REF) (inches) N/A 2.262 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 2 | Nominal O.D. (inches) N/A 2 1/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 50.4 | Metric O.D. (mm) N/A 57.5 |
1-227 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 2.109 | I.D. Tolerance (±) N/A 0.018 | O.D. (REF) (inches) N/A 2.387 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 2 1/8 | Nominal O.D. (inches) N/A 2 3/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 53.6 | Metric O.D. (mm) N/A 60.6 |
1-228 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 2.234 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 2.512 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 2 1/4 | Nominal O.D. (inches) N/A 2 1/2 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 56.7 | Metric O.D. (mm) N/A 63.8 |
1-229 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 2.359 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 2.637 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 2 3/8 | Nominal O.D. (inches) N/A 2 5/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 59.9 | Metric O.D. (mm) N/A 67.0 |
1-230 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 2.484 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 2.762 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 2 1/2 | Nominal O.D. (inches) N/A 2 3/4 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 63.1 | Metric O.D. (mm) N/A 70.2 |
1-231 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 2.609 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 2.887 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 2 5/8 | Nominal O.D. (inches) N/A 2 7/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 66.3 | Metric O.D. (mm) N/A 73.3 |
1-232 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 2.734 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.012 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 2 3/4 | Nominal O.D. (inches) N/A 3 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 69.4 | Metric O.D. (mm) N/A 76.5 |
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 |
1-234 | 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 |
1-235 | 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 |
1-236 | 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 |
1-237 | 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 |
1-238 | 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 |
1-239 | 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 |
1-240 | 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 |
1-241 | 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 |
1-242 | 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 |
1-243 | 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 |
1-244 | 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 |
1-245 | 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 |
1-246 | 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 |
1-247 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 4.609 | I.D. Tolerance (±) N/A 0.030 | O.D. (REF) (inches) N/A 4.887 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 4 5/8 | Nominal O.D. (inches) N/A 4 7/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 117.1 | Metric O.D. (mm) N/A 124.1 |
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 |
1-249 | 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 |
1-250 | 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 |