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) |
---|---|---|---|---|---|---|---|---|---|---|---|
1-521 | C/S (inches) N/A 0.176 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.413 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.765 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 1 7/16 | Nominal O.D. (inches) N/A 1 3/4 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 35.9 | Metric O.D. (mm) N/A 44.8 |
1-520 | C/S (inches) N/A 0.176 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.350 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.702 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 1 3/8 | Nominal O.D. (inches) N/A 1 11/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 34.3 | Metric O.D. (mm) N/A 43.2 |
1-519 | C/S (inches) N/A 0.176 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.288 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.640 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 1 5/16 | Nominal O.D. (inches) N/A 1 5/8 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 32.7 | Metric O.D. (mm) N/A 41.7 |
1-518 | C/S (inches) N/A 0.176 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.225 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.577 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 1 1/4 | Nominal O.D. (inches) N/A 1 9/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 31.1 | Metric O.D. (mm) N/A 40.1 |
1-517 | C/S (inches) N/A 0.176 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.163 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.515 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 1 3/16 | Nominal O.D. (inches) N/A 1 1/2 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 29.5 | Metric O.D. (mm) N/A 38.5 |
1-516 | C/S (inches) N/A 0.176 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.100 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.452 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 1 1/8 | Nominal O.D. (inches) N/A 1 7/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 24.9 | Metric O.D. (mm) N/A 36.9 |
1-515 | C/S (inches) N/A 0.176 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.038 | I.D. Tolerance (±) N/A 0.010 | O.D. (REF) (inches) N/A 1.390 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 1 1/16 | Nominal O.D. (inches) N/A 1 3/8 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 26.4 | Metric O.D. (mm) N/A 35.3 |
1-514 | C/S (inches) N/A 0.176 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 0.975 | I.D. Tolerance (±) N/A 0.010 | O.D. (REF) (inches) N/A 1.327 | Nominal C/S (inches) N/A 5/32 | Nominal I.D. (inches) N/A 1 | Nominal O.D. (inches) N/A 1 5/16 | Metric C/S (mm) N/A 4.5 | Metric I.D. (mm) N/A 24.8 | Metric O.D. (mm) N/A 33.7 |
1-476 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 26.955 | I.D. Tolerance (±) N/A 0.120 | O.D. (REF) (inches) N/A 27.505 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 27 | Nominal O.D. (inches) N/A 27 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 684.7 | Metric O.D. (mm) N/A 698.6 |
1-475 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 25.940 | I.D. Tolerance (±) N/A 0.120 | O.D. (REF) (inches) N/A 26.490 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 26 | Nominal O.D. (inches) N/A 26 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 658.9 | Metric O.D. (mm) N/A 672.8 |
1-474 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 24.940 | I.D. Tolerance (±) N/A 0.115 | O.D. (REF) (inches) N/A 25.490 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 25 | Nominal O.D. (inches) N/A 25 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 633.5 | Metric O.D. (mm) N/A 647.4 |
1-473 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 23.940 | I.D. Tolerance (±) N/A 0.110 | O.D. (REF) (inches) N/A 24.490 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 24 | Nominal O.D. (inches) N/A 24 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 608.1 | Metric O.D. (mm) N/A 622.0 |
1-472 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 22.940 | I.D. Tolerance (±) N/A 0.105 | O.D. (REF) (inches) N/A 23.490 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 23 | Nominal O.D. (inches) N/A 23 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 582.7 | Metric O.D. (mm) N/A 596.6 |
1-471 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 21.955 | I.D. Tolerance (±) N/A 0.100 | O.D. (REF) (inches) N/A 22.505 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 22 | Nominal O.D. (inches) N/A 22 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 557.7 | Metric O.D. (mm) N/A 571.6 |
1-470 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 20.955 | I.D. Tolerance (±) N/A 0.095 | O.D. (REF) (inches) N/A 21.505 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 21 | Nominal O.D. (inches) N/A 21 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 532.3 | Metric O.D. (mm) N/A 546.2 |
1-469 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 19.955 | I.D. Tolerance (±) N/A 0.095 | O.D. (REF) (inches) N/A 20.505 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 20 | Nominal O.D. (inches) N/A 20 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 506.9 | Metric O.D. (mm) N/A 520.8 |
1-468 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 19.455 | I.D. Tolerance (±) N/A 0.090 | O.D. (REF) (inches) N/A 20.005 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 19 1/2 | Nominal O.D. (inches) N/A 20 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 494.2 | Metric O.D. (mm) N/A 508.1 |
1-467 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 18.955 | I.D. Tolerance (±) N/A 0.090 | O.D. (REF) (inches) N/A 19.505 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 19 | Nominal O.D. (inches) N/A 19 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 481.5 | Metric O.D. (mm) N/A 495.4 |
1-466 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 18.455 | I.D. Tolerance (±) N/A 0.085 | O.D. (REF) (inches) N/A 19.005 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 18 1/2 | Nominal O.D. (inches) N/A 19 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 468.8 | Metric O.D. (mm) N/A 482.7 |
1-465 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 17.955 | I.D. Tolerance (±) N/A 0.085 | O.D. (REF) (inches) N/A 18.505 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 18 | Nominal O.D. (inches) N/A 18 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 456.1 | Metric O.D. (mm) N/A 470.0 |
1-464 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 17.455 | I.D. Tolerance (±) N/A 0.085 | O.D. (REF) (inches) N/A 18.005 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 17 1/2 | Nominal O.D. (inches) N/A 18 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 443.4 | Metric O.D. (mm) N/A 457.3 |
1-463 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 16.955 | I.D. Tolerance (±) N/A 0.080 | O.D. (REF) (inches) N/A 17.505 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 17 | Nominal O.D. (inches) N/A 17 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 430.7 | Metric O.D. (mm) N/A 444.6 |
1-462 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 16.455 | I.D. Tolerance (±) N/A 0.075 | O.D. (REF) (inches) N/A 17.005 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 16 1/2 | Nominal O.D. (inches) N/A 17 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 418.0 | Metric O.D. (mm) N/A 431.9 |
1-461 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 15.955 | I.D. Tolerance (±) N/A 0.075 | O.D. (REF) (inches) N/A 16.505 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 16 | Nominal O.D. (inches) N/A 16 1/2 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 405.3 | Metric O.D. (mm) N/A 419.2 |
1-460 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 15.475 | I.D. Tolerance (±) N/A 0.070 | O.D. (REF) (inches) N/A 16.025 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 15 1/2 | Nominal O.D. (inches) N/A 16 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 393.1 | Metric O.D. (mm) N/A 407.0 |