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)

54-344SS N/A 0.055 N/A 0.003 N/A 0.351 N/A 0.005 N/A 0.461 N/A 1.4 N/A 8.9 N/A 11.7
55-489 N/A 0.055 N/A 0.003 N/A 0.489 N/A 0.005 N/A 0.599 N/A 1.4 N/A 12.4 N/A 15.2
55-530 N/A 0.055 N/A 0.003 N/A 0.530 N/A 0.005 N/A 0.640 N/A 1.4 N/A 13.5 N/A 16.3
54-908SS N/A 0.055 N/A 0.003 N/A 0.917 N/A 0.009 N/A 1.027 N/A 1.4 N/A 23.3 N/A 26.1
55-1.000 N/A 0.055 N/A 0.003 N/A 1.000 N/A 0.010 N/A 1.110 N/A 1.4 N/A 25.4 N/A 28.2
54-1.228SS N/A 0.055 N/A 0.003 N/A 1.240 N/A 0.011 N/A 1.350 N/A 1.4 N/A 31.5 N/A 34.3
55-1.290 N/A 0.055 N/A 0.003 N/A 1.290 N/A 0.011 N/A 1.400 N/A 1.4 N/A 32.8 N/A 35.6
55-1.500 N/A 0.055 N/A 0.003 N/A 1.500 N/A 0.013 N/A 1.610 N/A 1.4 N/A 38.1 N/A 4.9
55-1.560 N/A 0.055 N/A 0.003 N/A 1.560 N/A 0.013 N/A 1.670 N/A 1.4 N/A 39.6 N/A 42.4
55-1.775 N/A 0.055 N/A 0.003 N/A 1.775 N/A 0.015 N/A 1.885 N/A 1.4 N/A 45.1 N/A 47.9
56-60 N/A 0.056 N/A 0.003 N/A 0.060 N/A 0.004 N/A 0.172 N/A 1.4 N/A 1.5 N/A 4.4
56-61VS N/A 0.056 N/A 0.003 N/A 0.062 N/A 0.004 N/A 0.174 N/A 1.4 N/A 1.6 N/A 4.4
56-78 N/A 0.056 N/A 0.003 N/A 0.078 N/A 0.005 N/A 0.190 N/A 1.4 N/A 2.0 N/A 4.8
56-176 N/A 0.056 N/A 0.003 N/A 0.176 N/A 0.005 N/A 0.288 N/A 1.4 N/A 4.5 N/A 7.3
56-1.148 N/A 0.056 N/A 0.003 N/A 1.148 N/A 0.010 N/A 1.260 N/A 1.4 N/A 29.2 N/A 32.0
56-125VS N/A 0.057 N/A 0.003 N/A 0.127 N/A 0.005 N/A 0.241 N/A 1.4 N/A 3.2 N/A 6.1
56-239VS N/A 0.057 N/A 0.003 N/A 0.243 N/A 0.005 N/A 0.357 N/A 1.4 N/A 6.2 N/A 9.1
56-355VS N/A 0.057 N/A 0.003 N/A 0.358 N/A 0.005 N/A 0.472 N/A 1.4 N/A 9.1 N/A 12
56-414SS N/A 0.057 N/A 0.003 N/A 0.418 N/A 0.005 N/A 0.532 N/A 1.4 N/A 1.6 N/A 13.5
57-658 N/A 0.057 N/A 0.003 N/A 0.658 N/A 0.009 N/A 0.772 N/A 1.4 N/A 16.7 N/A 19.6
56-670SS N/A 0.057 N/A 0.003 N/A 0.676 N/A 0.009 N/A 0.790 N/A 1.4 N/A 17.2 N/A 2.1
56-1.506SS N/A 0.057 N/A 0.003 N/A 1.520 N/A 0.013 N/A 1.634 N/A 1.4 N/A 38.6 N/A 41.5
58-610 N/A 0.058 N/A 0.003 N/A 0.610 N/A 0.007 N/A 0.726 N/A 1.5 N/A 15.5 N/A 18.4
57-690VS N/A 0.058 N/A 0.003 N/A 0.700 N/A 0.009 N/A 0.816 N/A 1.5 N/A 17.8 N/A 2.7
58-989 N/A 0.058 N/A 0.003 N/A 0.989 N/A 0.010 N/A 1.105 N/A 1.5 N/A 25.1 N/A 28.1
Unit of Measure
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