Precision Associates, Inc.
Precision Associates, Inc.
3800 North Washington Ave.
Minneapolis, MN 55412-2142
Toll Free: 1-800-394-6590
Local: +1 612-333-7464
Sales: +1 612-334-9190
Fax: 612-342-2417
Email: [email protected]
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Search our 2,700+ Standard & Special Size O-Ring Tooling List. O-Rings are available with inside diameters (ID) as small as .004" and as large as 34". If you can't find your O-Ring size, please call - new O ring sizes are added regularly. If we are not tooled for your non-standard O-Ring, we can make a special tool in our On-Site mold shop.

Click here to view our O-Ring Brochure.
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)

Metric C/S (mm)

Metric I.D. (mm)

Metric O.D. (mm)

49-782SS N/A 0.050 N/A 0.003 N/A 0.797 N/A 0.009 N/A 0.897 N/A 1.3 N/A 2.2 N/A 22.8
50-875 N/A 0.050 N/A 0.003 N/A 0.875 N/A 0.009 N/A 0.975 N/A 1.3 N/A 22.2 N/A 24.8
50-984 N/A 0.050 N/A 0.003 N/A 0.984 N/A 0.009 N/A 1.084 N/A 1.3 N/A 25.0 N/A 27.5
50-1.250 N/A 0.050 N/A 0.003 N/A 1.250 N/A 0.011 N/A 1.350 N/A 1.3 N/A 31.8 N/A 34.3
50-1.325 N/A 0.050 N/A 0.003 N/A 1.325 N/A 0.011 N/A 1.425 N/A 1.3 N/A 33.7 N/A 36.2
50-1.406 N/A 0.050 N/A 0.003 N/A 1.411 N/A 0.013 N/A 1.511 N/A 1.3 N/A 35.8 N/A 38.4
50-1.500 N/A 0.050 N/A 0.003 N/A 1.500 N/A 0.013 N/A 1.600 N/A 1.3 N/A 38.1 N/A 4.6
50-1.675 N/A 0.050 N/A 0.003 N/A 1.675 N/A 0.013 N/A 1.775 N/A 1.3 N/A 42.5 N/A 45.1
50-1.690 N/A 0.050 N/A 0.003 N/A 1.690 N/A 0.013 N/A 1.790 N/A 1.3 N/A 42.9 N/A 45.5
50-1.796 N/A 0.050 N/A 0.003 N/A 1.796 N/A 0.015 N/A 1.896 N/A 1.3 N/A 45.6 N/A 48.2
50-1.864 N/A 0.050 N/A 0.003 N/A 1.864 N/A 0.015 N/A 1.964 N/A 1.3 N/A 47.3 N/A 49.9
50-2.070 N/A 0.050 N/A 0.003 N/A 2.070 N/A 0.018 N/A 2.170 N/A 1.3 N/A 52.6 N/A 55.1
50-2.520VS N/A 0.050 N/A 0.003 N/A 2.534 N/A 0.018 N/A 2.634 N/A 1.3 N/A 64.4 N/A 66.9
50-2.719 N/A 0.050 N/A 0.003 N/A 2.719 N/A 0.020 N/A 2.819 N/A 1.3 N/A 69.1 N/A 71.6
50-3.670 N/A 0.050 N/A 0.003 N/A 3.661 N/A 0.024 N/A 3.761 N/A 1.3 N/A 93 N/A 95.5
50-3.670SS N/A 0.050 N/A 0.003 N/A 3.704 N/A 0.024 N/A 3.804 N/A 1.3 N/A 94.1 N/A 96.6
50-5.163VS N/A 0.050 N/A 0.003 N/A 5.212 N/A 0.037 N/A 5.312 N/A 1.3 N/A 132.4 N/A 134.9
50-6.567VS N/A 0.050 N/A 0.003 N/A 6.629 N/A 0.040 N/A 6.729 N/A 1.3 N/A 168.4 N/A 17.9
50-94VS N/A 0.051 N/A 0.003 N/A 0.096 N/A 0.005 N/A 0.198 N/A 1.3 N/A 2.4 N/A 5.0
51-102 N/A 0.051 N/A 0.003 N/A 0.102 N/A 0.005 N/A 0.204 N/A 1.3 N/A 2.6 N/A 5.2
51-110 N/A 0.051 N/A 0.003 N/A 0.11 N/A 0.005 N/A 0.212 N/A 1.3 N/A 2.8 N/A 5.4
51-239 N/A 0.051 N/A 0.003 N/A 0.239 N/A 0.005 N/A 0.341 N/A 1.3 N/A 6.1 N/A 8.7
51-249 N/A 0.051 N/A 0.003 N/A 0.249 N/A 0.005 N/A 0.351 N/A 1.3 N/A 6.3 N/A 8.9
51-313 N/A 0.051 N/A 0.003 N/A 0.313 N/A 0.005 N/A 0.415 N/A 1.3 N/A 8.0 N/A 1.5
50-386SS N/A 0.051 N/A 0.003 N/A 0.390 N/A 0.005 N/A 0.492 N/A 1.3 N/A 9.9 N/A 12.5
Unit of Measure
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