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)

70-275 N/A 0.070 N/A 0.003 N/A 0.275 N/A 0.005 N/A 0.415 N/A 1.8 N/A 7.0 N/A 1.5
70-291 N/A 0.070 N/A 0.003 N/A 0.291 N/A 0.005 N/A 0.431 N/A 1.8 N/A 7.4 N/A 1.9
70-313ES N/A 0.070 N/A 0.003 N/A 0.315 N/A 0.005 N/A 0.455 N/A 1.8 N/A 8.0 N/A 11.6
70-320 N/A 0.070 N/A 0.003 N/A 0.320 N/A 0.005 N/A 0.460 N/A 1.8 N/A 8.1 N/A 11.7
70-334 N/A 0.070 N/A 0.003 N/A 0.334 N/A 0.005 N/A 0.474 N/A 1.8 N/A 8.5 N/A 12
70-373ES N/A 0.070 N/A 0.003 N/A 0.374 N/A 0.005 N/A 0.514 N/A 1.8 N/A 9.5 N/A 13.1
70-395 N/A 0.070 N/A 0.003 N/A 0.395 N/A 0.005 N/A 0.535 N/A 1.8 N/A 10.0 N/A 13.6
70-437 N/A 0.070 N/A 0.003 N/A 0.437 N/A 0.005 N/A 0.577 N/A 1.8 N/A 11.1 N/A 14.7
70-455 N/A 0.070 N/A 0.003 N/A 0.455 N/A 0.005 N/A 0.595 N/A 1.8 N/A 11.6 N/A 15.1
70-460 N/A 0.070 N/A 0.003 N/A 0.460 N/A 0.005 N/A 0.600 N/A 1.8 N/A 11.7 N/A 15.2
70-466 N/A 0.070 N/A 0.003 N/A 0.466 N/A 0.005 N/A 0.606 N/A 1.8 N/A 11.8 N/A 15.4
70-487VS N/A 0.070 N/A 0.003 N/A 0.490 N/A 0.005 N/A 0.630 N/A 1.8 N/A 12.4 N/A 16.0
70-505 N/A 0.070 N/A 0.003 N/A 0.505 N/A 0.005 N/A 0.645 N/A 1.8 N/A 12.8 N/A 16.4
70-583 N/A 0.070 N/A 0.003 N/A 0.583 N/A 0.007 N/A 0.723 N/A 1.8 N/A 14.8 N/A 18.4
70-646 N/A 0.070 N/A 0.003 N/A 0.646 N/A 0.009 N/A 0.786 N/A 1.8 N/A 16.4 N/A 20
70-652 N/A 0.070 N/A 0.003 N/A 0.652 N/A 0.009 N/A 0.792 N/A 1.8 N/A 16.6 N/A 2.1
70-675ES N/A 0.070 N/A 0.003 N/A 0.676 N/A 0.009 N/A 0.816 N/A 1.8 N/A 17.2 N/A 2.7
70-706 N/A 0.070 N/A 0.003 N/A 0.706 N/A 0.009 N/A 0.846 N/A 1.8 N/A 17.9 N/A 21.5
70-720 N/A 0.070 N/A 0.003 N/A 0.720 N/A 0.009 N/A 0.860 N/A 1.8 N/A 18.3 N/A 21.8
70-724 N/A 0.070 N/A 0.003 N/A 0.724 N/A 0.009 N/A 0.864 N/A 1.8 N/A 18.4 N/A 21.9
70-769 N/A 0.070 N/A 0.003 N/A 0.769 N/A 0.009 N/A 0.909 N/A 1.8 N/A 19.5 N/A 23.1
70-943 N/A 0.070 N/A 0.003 N/A 0.943 N/A 0.009 N/A 1.083 N/A 1.8 N/A 24 N/A 27.5
70-1.015ES N/A 0.070 N/A 0.003 N/A 1.017 N/A 0.010 N/A 1.157 N/A 1.8 N/A 25.8 N/A 29.4
69-1.157VS N/A 0.070 N/A 0.003 N/A 1.168 N/A 0.010 N/A 1.308 N/A 1.8 N/A 29.7 N/A 33.2
70-1.220ES N/A 0.070 N/A 0.003 N/A 1.222 N/A 0.011 N/A 1.362 N/A 1.8 N/A 31 N/A 34.6
Unit of Measure
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