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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.
O-Ring Picture
Unit of Measure
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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)

1-050 N/A 0.070 N/A 0.003 N/A 5.239 N/A 0.037 N/A 5.379 N/A 1/16 N/A 5 1/4 N/A 5 3/8 N/A 1.8 N/A 133.1 N/A 136.6
1-051 N/A 0.070 N/A 0.003 N/A 5.489 N/A 0.037 N/A 5.629 N/A 1/16 N/A 5 1/2 N/A 5 5/8 N/A 1.8 N/A 139.4 N/A 143.0
1-052 N/A 0.070 N/A 0.003 N/A 5.739 N/A 0.037 N/A 5.879 N/A 1/16 N/A 5 3/4 N/A 5 7/8 N/A 1.8 N/A 145.8 N/A 149.3
1-053 N/A 0.070 N/A 0.003 N/A 5.989 N/A 0.037 N/A 6.129 N/A 1/16 N/A 6 N/A 6 1/8 N/A 1.8 N/A 152.1 N/A 155.7
1-054 N/A 0.070 N/A 0.003 N/A 6.239 N/A 0.040 N/A 6.379 N/A 1/16 N/A 6 1/4 N/A 6 3/8 N/A 1.8 N/A 158.5 N/A 162.0
1-055 N/A 0.070 N/A 0.003 N/A 6.489 N/A 0.040 N/A 6.629 N/A 1/16 N/A 6 1/2 N/A 6 5/8 N/A 1.8 N/A 164.8 N/A 168.4
1-056 N/A 0.070 N/A 0.003 N/A 6.739 N/A 0.040 N/A 6.879 N/A 1/16 N/A 6 3/4 N/A 6 7/8 N/A 1.8 N/A 171.2 N/A 174.7
1-057 N/A 0.070 N/A 0.003 N/A 6.989 N/A 0.040 N/A 7.129 N/A 1/16 N/A 7 N/A 7 1/8 N/A 1.8 N/A 177.5 N/A 181.1
1-058 N/A 0.070 N/A 0.003 N/A 7.239 N/A 0.045 N/A 7.379 N/A 1/16 N/A 7 1/2 N/A 7 3/8 N/A 1.8 N/A 183.9 N/A 187.4
1-059 N/A 0.070 N/A 0.003 N/A 7.489 N/A 0.045 N/A 7.629 N/A 1/16 N/A 7 1/4 N/A 7 5/8 N/A 1.8 N/A 190.2 N/A 193.8
1-060 N/A 0.070 N/A 0.003 N/A 7.739 N/A 0.045 N/A 7.879 N/A 1/16 N/A 7 3/4 N/A 7 7/8 N/A 1.8 N/A 196.6 N/A 200.1
1-061 N/A 0.070 N/A 0.003 N/A 7.989 N/A 0.045 N/A 8.129 N/A 1/16 N/A 8 N/A 8 1/8 N/A 1.8 N/A 202.9 N/A 206.5
1-102 N/A 0.103 N/A 0.003 N/A 0.050 N/A 0.005 N/A 0.256 N/A 3/32 N/A 1/16 N/A 1/4 N/A 2.6 N/A 1.3 N/A 6.5
1-103 N/A 0.103 N/A 0.003 N/A 0.081 N/A 0.005 N/A 0.287 N/A 3/32 N/A 3/32 N/A 9/32 N/A 2.6 N/A 2.1 N/A 7.3
1-104 N/A 0.103 N/A 0.003 N/A 0.112 N/A 0.005 N/A 0.318 N/A 3/32 N/A 1/8 N/A 5/16 N/A 2.6 N/A 2.8 N/A 8.1
1-105 N/A 0.103 N/A 0.003 N/A 0.143 N/A 0.005 N/A 0.349 N/A 3/32 N/A 5/32 N/A 11/32 N/A 2.6 N/A 3.6 N/A 8.9
1-106 N/A 0.103 N/A 0.003 N/A 0.175 N/A 0.005 N/A 0.381 N/A 3/32 N/A 3/16 N/A 3/8 N/A 2.6 N/A 4.4 N/A 9.7
1-107 N/A 0.103 N/A 0.003 N/A 0.206 N/A 0.005 N/A 0.412 N/A 3/32 N/A 7/32 N/A 13/32 N/A 2.6 N/A 5.2 N/A 10.5
1-108 N/A 0.103 N/A 0.003 N/A 0.237 N/A 0.005 N/A 0.443 N/A 3/32 N/A 1/4 N/A 7/16 N/A 2.6 N/A 6.0 N/A 11.3
1-109 N/A 0.103 N/A 0.003 N/A 0.299 N/A 0.005 N/A 0.505 N/A 3/32 N/A 5/16 N/A 1/2 N/A 2.6 N/A 7.6 N/A 12.8
1-110 N/A 0.103 N/A 0.003 N/A 0.362 N/A 0.005 N/A 0.568 N/A 3/32 N/A 3/8 N/A 9/16 N/A 2.6 N/A 9.2 N/A 14.4
1-111 N/A 0.103 N/A 0.003 N/A 0.424 N/A 0.005 N/A 0.630 N/A 3/32 N/A 7/16 N/A 5/8 N/A 2.6 N/A 10.8 N/A 16.0
1-112 N/A 0.103 N/A 0.003 N/A 0.487 N/A 0.005 N/A 0.693 N/A 3/32 N/A 1/2 N/A 11/16 N/A 2.6 N/A 12.4 N/A 17.6
1-113 N/A 0.103 N/A 0.003 N/A 0.549 N/A 0.007 N/A 0.755 N/A 3/32 N/A 9/16 N/A 3/4 N/A 2.6 N/A 13.9 N/A 19.2
1-114 N/A 0.103 N/A 0.003 N/A 0.612 N/A 0.009 N/A 0.818 N/A 3/32 N/A 5/8 N/A 13/16 N/A 2.6 N/A 15.5 N/A 20.8
Unit of Measure
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