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) |
---|---|---|---|---|---|---|---|---|---|---|---|
1-406 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 2.100 | I.D. Tolerance (±) N/A 0.018 | O.D. (REF) (inches) N/A 2.650 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 2 1/8 | Nominal O.D. (inches) N/A 2 5/8 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 53.3 | Metric O.D. (mm) N/A 67.3 |
1-144 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 2.487 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 2.693 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 2 1/2 | Nominal O.D. (inches) N/A 2 11/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 63.2 | Metric O.D. (mm) N/A 68.4 |
1-536 | C/S (inches) N/A 0.176 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 2.350 | I.D. Tolerance (±) N/A 0.018 | O.D. (REF) (inches) N/A 2.702 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 2 3/8 | Nominal O.D. (inches) N/A 2 11/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 59.7 | Metric O.D. (mm) N/A 68.6 |
1-038 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 2.614 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 2.754 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 2 5/8 | Nominal O.D. (inches) N/A 2 3/4 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 66.4 | Metric O.D. (mm) N/A 70.0 |
1-145 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 2.550 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 2.756 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 2 9/16 | Nominal O.D. (inches) N/A 2 3/4 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 64.8 | Metric O.D. (mm) N/A 70.0 |
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 |
1-332 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 2.350 | I.D. Tolerance (±) N/A 0.018 | O.D. (REF) (inches) N/A 2.770 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 2 3/8 | Nominal O.D. (inches) N/A 2 3/4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 59.7 | Metric O.D. (mm) N/A 70.4 |
1-407 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 2.225 | I.D. Tolerance (±) N/A 0.018 | O.D. (REF) (inches) N/A 2.775 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 2 1/4 | Nominal O.D. (inches) N/A 2 3/4 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 56.5 | Metric O.D. (mm) N/A 70.5 |
1-146 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 2.612 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 2.818 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 2 5/8 | Nominal O.D. (inches) N/A 2 13/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 66.3 | Metric O.D. (mm) N/A 71.6 |
1-538 | C/S (inches) N/A 0.176 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 2.475 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 2.827 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 2 1/2 | Nominal O.D. (inches) N/A 2 13/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 62.9 | Metric O.D. (mm) N/A 71.8 |
1-039 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 2.739 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 2.879 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 2 3/4 | Nominal O.D. (inches) N/A 2 7/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 69.6 | Metric O.D. (mm) N/A 73.1 |
1-147 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 2.675 | I.D. Tolerance (±) N/A 0.022 | O.D. (REF) (inches) N/A 2.881 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 2 11/16 | Nominal O.D. (inches) N/A 2 7/8 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 67.9 | Metric O.D. (mm) N/A 73.2 |
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 |
1-333 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 2.475 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 2.895 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 2 1/2 | Nominal O.D. (inches) N/A 2 7/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 62.9 | Metric O.D. (mm) N/A 73.5 |
1-408 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 2.350 | I.D. Tolerance (±) N/A 0.018 | O.D. (REF) (inches) N/A 2.900 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 2 3/8 | Nominal O.D. (inches) N/A 2 7/8 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 59.7 | Metric O.D. (mm) N/A 73.7 |
1-148 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 2.737 | I.D. Tolerance (±) N/A 0.022 | O.D. (REF) (inches) N/A 2.943 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 2 3/4 | Nominal O.D. (inches) N/A 2 15/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 69.5 | Metric O.D. (mm) N/A 74.8 |
1-540 | C/S (inches) N/A 0.176 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 2.600 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 2.952 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 2 5/8 | Nominal O.D. (inches) N/A 2 15/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 66.0 | Metric O.D. (mm) N/A 75.0 |
1-040 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 2.864 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 3.004 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 2 7/8 | Nominal O.D. (inches) N/A 3 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 72.7 | Metric O.D. (mm) N/A 76.3 |
1-149 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 2.800 | I.D. Tolerance (±) N/A 0.022 | O.D. (REF) (inches) N/A 3.006 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 2 13/16 | Nominal O.D. (inches) N/A 3 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 71.1 | Metric O.D. (mm) N/A 76.4 |
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 |
1-334 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 2.600 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 3.020 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 2 5/8 | Nominal O.D. (inches) N/A 3 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 66.0 | Metric O.D. (mm) N/A 76.7 |
1-409 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 2.475 | I.D. Tolerance (±) N/A 0.020 | O.D. (REF) (inches) N/A 3.025 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 2 1/2 | Nominal O.D. (inches) N/A 3 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 62.9 | Metric O.D. (mm) N/A 76.8 |
1-150 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 2.862 | I.D. Tolerance (±) N/A 0.022 | O.D. (REF) (inches) N/A 3.068 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 2 7/8 | Nominal O.D. (inches) N/A 3 1/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 72.7 | Metric O.D. (mm) N/A 77.9 |
1-542 | C/S (inches) N/A 0.176 | 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 3.077 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 2 3/4 | Nominal O.D. (inches) N/A 3 1/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 69.2 | Metric O.D. (mm) N/A 78.2 |
1-041 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 2.989 | I.D. Tolerance (±) N/A 0.024 | O.D. (REF) (inches) N/A 3.129 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 3 | Nominal O.D. (inches) N/A 3 1/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 75.9 | Metric O.D. (mm) N/A 79.5 |