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)

100-984 N/A 0.100 N/A 0.003 N/A 0.984 N/A 0.010 N/A 1.184 N/A 2.5 N/A 25.0 N/A 3.1
103-312 N/A 0.103 N/A 0.003 N/A 0.312 N/A 0.005 N/A 0.518 N/A 2.6 N/A 7.9 N/A 13.2
103-326 N/A 0.103 N/A 0.003 N/A 0.326 N/A 0.005 N/A 0.532 N/A 2.6 N/A 8.3 N/A 13.5
103-391 N/A 0.103 N/A 0.003 N/A 0.391 N/A 0.005 N/A 0.597 N/A 2.6 N/A 9.9 N/A 15.2
103-456 N/A 0.103 N/A 0.003 N/A 0.456 N/A 0.005 N/A 0.662 N/A 2.6 N/A 11.6 N/A 16.8
103-590 N/A 0.103 N/A 0.003 N/A 0.590 N/A 0.007 N/A 0.796 N/A 2.6 N/A 15 N/A 2.2
103-643 N/A 0.103 N/A 0.003 N/A 0.643 N/A 0.009 N/A 0.849 N/A 2.6 N/A 16.3 N/A 21.6
103-700 N/A 0.103 N/A 0.003 N/A 0.700 N/A 0.009 N/A 0.906 N/A 2.6 N/A 17.8 N/A 23
103-768 N/A 0.103 N/A 0.003 N/A 0.768 N/A 0.009 N/A 0.974 N/A 2.6 N/A 19.5 N/A 24.7
103-814 N/A 0.103 N/A 0.003 N/A 0.814 N/A 0.010 N/A 1.020 N/A 2.6 N/A 2.7 N/A 25.9
103-850 N/A 0.103 N/A 0.003 N/A 0.848 N/A 0.010 N/A 1.054 N/A 2.6 N/A 21.5 N/A 26.8
103-940 N/A 0.103 N/A 0.003 N/A 0.940 N/A 0.010 N/A 1.146 N/A 2.6 N/A 23.9 N/A 29.1
103-1.718 N/A 0.103 N/A 0.003 N/A 1.718 N/A 0.015 N/A 1.924 N/A 2.6 N/A 43.6 N/A 48.9
103-1.812 N/A 0.103 N/A 0.003 N/A 1.812 N/A 0.015 N/A 2.018 N/A 2.6 N/A 46 N/A 51.3
103-1.968 N/A 0.103 N/A 0.003 N/A 1.968 N/A 0.017 N/A 2.174 N/A 2.6 N/A 50.0 N/A 55.2
103-2.340 N/A 0.103 N/A 0.003 N/A 2.340 N/A 0.020 N/A 2.546 N/A 2.6 N/A 59.4 N/A 64.7
103-2.450 N/A 0.103 N/A 0.003 N/A 2.450 N/A 0.020 N/A 2.656 N/A 2.6 N/A 62.2 N/A 67.5
103-2.830 N/A 0.103 N/A 0.003 N/A 2.830 N/A 0.022 N/A 3.036 N/A 2.6 N/A 71.9 N/A 77.1
103-3.000 N/A 0.103 N/A 0.003 N/A 3.000 N/A 0.024 N/A 3.206 N/A 2.6 N/A 76.2 N/A 81.4
103-3.109 N/A 0.103 N/A 0.003 N/A 3.109 N/A 0.024 N/A 3.315 N/A 2.6 N/A 79.0 N/A 84.2
103-3.147 N/A 0.103 N/A 0.003 N/A 3.147 N/A 0.024 N/A 3.353 N/A 2.6 N/A 79.9 N/A 85.2
103-3.290 N/A 0.103 N/A 0.003 N/A 3.290 N/A 0.024 N/A 3.496 N/A 2.6 N/A 83.6 N/A 88.8
103-3.359 N/A 0.103 N/A 0.003 N/A 3.359 N/A 0.024 N/A 3.565 N/A 2.6 N/A 85.3 N/A 9.6
103-3.362 N/A 0.103 N/A 0.003 N/A 3.362 N/A 0.024 N/A 3.568 N/A 2.6 N/A 85.4 N/A 9.6
103-3.410ES N/A 0.103 N/A 0.003 N/A 3.415 N/A 0.024 N/A 3.621 N/A 2.6 N/A 86.7 N/A 92.0
Unit of Measure
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