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)

70-2.950ES N/A 0.070 N/A 0.003 N/A 2.954 N/A 0.020 N/A 3.094 N/A 1.8 N/A 75 N/A 78.6
70-3.085 N/A 0.070 N/A 0.003 N/A 3.085 N/A 0.024 N/A 3.225 N/A 1.8 N/A 78.4 N/A 81.9
70-3.440 N/A 0.070 N/A 0.003 N/A 3.440 N/A 0.024 N/A 3.580 N/A 1.8 N/A 87.4 N/A 9.9
70-3.474 N/A 0.070 N/A 0.003 N/A 3.474 N/A 0.024 N/A 3.614 N/A 1.8 N/A 88.2 N/A 91.8
70-3.562 N/A 0.070 N/A 0.003 N/A 3.562 N/A 0.024 N/A 3.702 N/A 1.8 N/A 9.5 N/A 94.0
70-3.860 N/A 0.070 N/A 0.003 N/A 3.860 N/A 0.027 N/A 4.000 N/A 1.8 N/A 98.0 N/A 101.6
70-3.937 N/A 0.070 N/A 0.003 N/A 3.937 N/A 0.027 N/A 4.077 N/A 1.8 N/A 100 N/A 103.6
70-4.300 N/A 0.070 N/A 0.003 N/A 4.300 N/A 0.030 N/A 4.440 N/A 1.8 N/A 109.2 N/A 112.8
70-4.562 N/A 0.070 N/A 0.003 N/A 4.562 N/A 0.030 N/A 4.702 N/A 1.8 N/A 115.9 N/A 119.4
70-4.672 N/A 0.070 N/A 0.003 N/A 4.672 N/A 0.030 N/A 4.812 N/A 1.8 N/A 118.7 N/A 122.2
70-4.864 N/A 0.070 N/A 0.003 N/A 4.864 N/A 0.030 N/A 5.004 N/A 1.8 N/A 123.5 N/A 127.1
70-4.890 N/A 0.070 N/A 0.003 N/A 4.890 N/A 0.030 N/A 5.030 N/A 1.8 N/A 124.2 N/A 127.8
70-5.114 N/A 0.070 N/A 0.003 N/A 5.114 N/A 0.037 N/A 5.254 N/A 1.8 N/A 129.9 N/A 133.5
70-5.360 N/A 0.070 N/A 0.003 N/A 5.360 N/A 0.037 N/A 5.500 N/A 1.8 N/A 136.1 N/A 139.7
70-5.379 N/A 0.070 N/A 0.003 N/A 5.379 N/A 0.037 N/A 5.519 N/A 1.8 N/A 136.6 N/A 14.2
70-5.700 N/A 0.070 N/A 0.003 N/A 5.703 N/A 0.037 N/A 5.843 N/A 1.8 N/A 144.9 N/A 148.4
70-5.968 N/A 0.070 N/A 0.003 N/A 5.968 N/A 0.037 N/A 6.108 N/A 1.8 N/A 151.6 N/A 155.1
70-6.180 N/A 0.070 N/A 0.003 N/A 6.180 N/A 0.037 N/A 6.320 N/A 1.8 N/A 157 N/A 16.5
70-6.284ES N/A 0.070 N/A 0.003 N/A 6.306 N/A 0.040 N/A 6.446 N/A 1.8 N/A 16.2 N/A 163.7
70-6.309 N/A 0.070 N/A 0.003 N/A 6.309 N/A 0.040 N/A 6.449 N/A 1.8 N/A 16.2 N/A 163.8
70-6.310VS N/A 0.070 N/A 0.003 N/A 6.349 N/A 0.040 N/A 6.489 N/A 1.8 N/A 161.3 N/A 164.8
70-6.520 N/A 0.070 N/A 0.003 N/A 6.520 N/A 0.040 N/A 6.660 N/A 1.8 N/A 165.6 N/A 169.2
70-6.687 N/A 0.070 N/A 0.003 N/A 6.687 N/A 0.040 N/A 6.827 N/A 1.8 N/A 169.9 N/A 173.4
70-6.734 N/A 0.070 N/A 0.003 N/A 6.734 N/A 0.040 N/A 6.874 N/A 1.8 N/A 171.0 N/A 174.6
70-6.950 N/A 0.070 N/A 0.003 N/A 6.950 N/A 0.040 N/A 7.090 N/A 1.8 N/A 176.5 N/A 18.1
Unit of Measure
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