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) |
---|---|---|---|---|---|---|---|---|---|---|---|
1-123 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 1.174 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.380 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 1 3/16 | Nominal O.D. (inches) N/A 1 3/8 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 29.8 | Metric O.D. (mm) N/A 35.1 |
1-217 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 1.171 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.449 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 1 3/16 | Nominal O.D. (inches) N/A 1 7/16 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 29.7 | Metric O.D. (mm) N/A 36.8 |
1-321 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.162 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.582 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 3/16 | Nominal O.D. (inches) N/A 1 9/16 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 29.5 | Metric O.D. (mm) N/A 40.2 |
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 |
1-026 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 1.239 | I.D. Tolerance (±) N/A 0.011 | O.D. (REF) (inches) N/A 1.379 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 1 1/4 | Nominal O.D. (inches) N/A 1 3/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 31.5 | Metric O.D. (mm) N/A 35.0 |
1-124 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 1.237 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.443 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 1 1/4 | Nominal O.D. (inches) N/A 1 7/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 31.4 | Metric O.D. (mm) N/A 36.7 |
1-218 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 1.234 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.512 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 1 1/4 | Nominal O.D. (inches) N/A 1 1/2 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 31.3 | Metric O.D. (mm) N/A 38.4 |
1-322 | C/S (inches) N/A 0.210 | 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 1.645 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 1/4 | Nominal O.D. (inches) N/A 1 5/8 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 31.1 | Metric O.D. (mm) N/A 41.8 |
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 |
1-027 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 1.301 | I.D. Tolerance (±) N/A 0.011 | O.D. (REF) (inches) N/A 1.441 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 1 5/16 | Nominal O.D. (inches) N/A 1 7/16 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 33.0 | Metric O.D. (mm) N/A 36.6 |
1-125 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 1.299 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.505 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 1 5/16 | Nominal O.D. (inches) N/A 1 1/2 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 33.0 | Metric O.D. (mm) N/A 38.2 |
1-219 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 1.296 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.574 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 1 5/16 | Nominal O.D. (inches) N/A 1 9/16 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 32.9 | Metric O.D. (mm) N/A 40.0 |
1-323 | C/S (inches) N/A 0.210 | C/S Tolerance (±) N/A 0.005 | I.D. (inches) N/A 1.287 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.707 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 5/16 | Nominal O.D. (inches) N/A 1 11/16 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 32.7 | Metric O.D. (mm) N/A 43.4 |
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 |
1-028 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 1.364 | I.D. Tolerance (±) N/A 0.013 | O.D. (REF) (inches) N/A 1.504 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 1 3/8 | Nominal O.D. (inches) N/A 1 1/2 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 34.6 | Metric O.D. (mm) N/A 38.2 |
1-126 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 1.362 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.568 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 1 3/8 | Nominal O.D. (inches) N/A 1 9/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 34.6 | Metric O.D. (mm) N/A 39.8 |
1-220 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 1.359 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.637 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 1 3/8 | Nominal O.D. (inches) N/A 1 5/8 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 34.5 | Metric O.D. (mm) N/A 41.6 |
1-324 | C/S (inches) N/A 0.210 | 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 1.770 | Nominal C/S (inches) N/A 3/16 | Nominal I.D. (inches) N/A 1 3/8 | Nominal O.D. (inches) N/A 1 3/4 | Metric C/S (mm) N/A 5.3 | Metric I.D. (mm) N/A 34.3 | Metric O.D. (mm) N/A 45.0 |
1-400 | C/S (inches) N/A 0.275 | C/S Tolerance (±) N/A 0.006 | I.D. (inches) N/A 1.350 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.900 | Nominal C/S (inches) N/A 1/4 | Nominal I.D. (inches) N/A 1 3/8 | Nominal O.D. (inches) N/A 1 7/8 | Metric C/S (mm) N/A 7.0 | Metric I.D. (mm) N/A 34.3 | Metric O.D. (mm) N/A 48.3 |
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 |
1-127 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 1.424 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.630 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 1 7/16 | Nominal O.D. (inches) N/A 1 5/8 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 36.2 | Metric O.D. (mm) N/A 41.4 |
1-221 | C/S (inches) N/A 0.139 | C/S Tolerance (±) N/A 0.004 | I.D. (inches) N/A 1.421 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.699 | Nominal C/S (inches) N/A 1/8 | Nominal I.D. (inches) N/A 1 7/16 | Nominal O.D. (inches) N/A 1 11/16 | Metric C/S (mm) N/A 3.5 | Metric I.D. (mm) N/A 36.1 | Metric O.D. (mm) N/A 43.2 |
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 |
1-029 | C/S (inches) N/A 0.070 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 1.489 | I.D. Tolerance (±) N/A 0.013 | O.D. (REF) (inches) N/A 1.629 | Nominal C/S (inches) N/A 1/16 | Nominal I.D. (inches) N/A 1 1/2 | Nominal O.D. (inches) N/A 1 5/8 | Metric C/S (mm) N/A 1.8 | Metric I.D. (mm) N/A 37.8 | Metric O.D. (mm) N/A 41.4 |
1-128 | C/S (inches) N/A 0.103 | C/S Tolerance (±) N/A 0.003 | I.D. (inches) N/A 1.487 | I.D. Tolerance (±) N/A 0.012 | O.D. (REF) (inches) N/A 1.693 | Nominal C/S (inches) N/A 3/32 | Nominal I.D. (inches) N/A 1 1/2 | Nominal O.D. (inches) N/A 1 11/16 | Metric C/S (mm) N/A 2.6 | Metric I.D. (mm) N/A 37.8 | Metric O.D. (mm) N/A 43.0 |