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: pai@precisionassoc.com
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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)

70-7.360ES N/A 0.070 N/A 0.003 N/A 7.371 N/A 0.045 N/A 7.511 N/A 1.8 N/A 187.2 N/A 19.8
70-7.500 N/A 0.070 N/A 0.003 N/A 7.500 N/A 0.045 N/A 7.640 N/A 1.8 N/A 19.5 N/A 194.1
70-7.613 N/A 0.070 N/A 0.003 N/A 7.613 N/A 0.045 N/A 7.753 N/A 1.8 N/A 193.4 N/A 196.9
70-7.870 N/A 0.070 N/A 0.003 N/A 7.870 N/A 0.045 N/A 8.010 N/A 1.8 N/A 199.9 N/A 203.5
70-8.135ES N/A 0.070 N/A 0.003 N/A 8.148 N/A 0.045 N/A 8.288 N/A 1.8 N/A 207 N/A 21.5
70-9.435ES N/A 0.070 N/A 0.003 N/A 9.450 N/A 0.055 N/A 9.590 N/A 1.8 N/A 240 N/A 243.6
70-9.650ES N/A 0.070 N/A 0.003 N/A 9.665 N/A 0.055 N/A 9.805 N/A 1.8 N/A 245.5 N/A 249
70-9.675ES N/A 0.070 N/A 0.003 N/A 9.690 N/A 0.055 N/A 9.830 N/A 1.8 N/A 246.1 N/A 249.7
70-9.970 N/A 0.070 N/A 0.003 N/A 9.970 N/A 0.055 N/A 1.110 N/A 1.8 N/A 253.2 N/A 256.8
70-10.433ES N/A 0.070 N/A 0.003 N/A 10.459 N/A 0.055 N/A 10.599 N/A 1.8 N/A 265.7 N/A 269.2
70-11.085ES N/A 0.070 N/A 0.003 N/A 11.102 N/A 0.065 N/A 11.242 N/A 1.8 N/A 282 N/A 285.5
70-11.339ES N/A 0.070 N/A 0.003 N/A 11.368 N/A 0.065 N/A 11.508 N/A 1.8 N/A 288.7 N/A 292.3
70-11.989 N/A 0.070 N/A 0.003 N/A 11.989 N/A 0.065 N/A 12.129 N/A 1.8 N/A 304.5 N/A 308.1
70-12.720 N/A 0.070 N/A 0.003 N/A 12.720 N/A 0.065 N/A 12.860 N/A 1.8 N/A 323.1 N/A 326.6
70-13.114ES N/A 0.070 N/A 0.003 N/A 13.134 N/A 0.065 N/A 13.274 N/A 1.8 N/A 333.6 N/A 337.2
70-16.268SS N/A 0.070 N/A 0.003 N/A 16.357 N/A 0.075 N/A 16.497 N/A 1.8 N/A 415.5 N/A 419
70-16.535 N/A 0.070 N/A 0.003 N/A 16.577 N/A 0.075 N/A 16.717 N/A 1.8 N/A 421.1 N/A 424.6
70-87 N/A 0.071 N/A 0.003 N/A 0.088 N/A 0.005 N/A 0.23 N/A 1.8 N/A 2.2 N/A 5.8
70-98SS N/A 0.071 N/A 0.003 N/A 0.099 N/A 0.005 N/A 0.241 N/A 1.8 N/A 2.5 N/A 6.1
70-127SS N/A 0.071 N/A 0.003 N/A 0.129 N/A 0.005 N/A 0.271 N/A 1.8 N/A 3.3 N/A 6.9
71-211ES N/A 0.071 N/A 0.003 N/A 0.212 N/A 0.005 N/A 0.354 N/A 1.8 N/A 5.4 N/A 9.0
71-248 N/A 0.071 N/A 0.003 N/A 0.248 N/A 0.005 N/A 0.390 N/A 1.8 N/A 6.3 N/A 9.9
70-258SS N/A 0.071 N/A 0.003 N/A 0.262 N/A 0.005 N/A 0.404 N/A 1.8 N/A 6.7 N/A 1.3
70-270SS N/A 0.071 N/A 0.003 N/A 0.275 N/A 0.005 N/A 0.417 N/A 1.8 N/A 7.0 N/A 1.6
70-285SS N/A 0.071 N/A 0.003 N/A 0.290 N/A 0.005 N/A 0.432 N/A 1.8 N/A 7.4 N/A 11.0
Unit of Measure
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