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)

47-1.484SS N/A 0.048 N/A 0.003 N/A 1.501 N/A 0.013 N/A 1.597 N/A 1.2 N/A 38.1 N/A 4.6
47-2.495SS N/A 0.048 N/A 0.003 N/A 2.524 N/A 0.018 N/A 2.620 N/A 1.2 N/A 64.1 N/A 66.5
48-2.666 N/A 0.048 N/A 0.003 N/A 2.666 N/A 0.020 N/A 2.762 N/A 1.2 N/A 67.7 N/A 7.2
47-3.053SS N/A 0.048 N/A 0.003 N/A 3.112 N/A 0.024 N/A 3.208 N/A 1.2 N/A 79.0 N/A 81.5
49-508 N/A 0.049 N/A 0.003 N/A 0.508 N/A 0.005 N/A 0.606 N/A 1.2 N/A 12.9 N/A 15.4
49-1.130 N/A 0.049 N/A 0.003 N/A 1.130 N/A 0.010 N/A 1.228 N/A 1.2 N/A 28.7 N/A 31.2
50-94 N/A 0.050 N/A 0.003 N/A 0.094 N/A 0.005 N/A 0.194 N/A 1.3 N/A 2.4 N/A 4.9
50-120 N/A 0.050 N/A 0.003 N/A 0.120 N/A 0.005 N/A 0.220 N/A 1.3 N/A 3.0 N/A 5.6
50-129 N/A 0.050 N/A 0.003 N/A 0.129 N/A 0.005 N/A 0.229 N/A 1.3 N/A 3.3 N/A 5.8
50-140 N/A 0.050 N/A 0.003 N/A 0.140 N/A 0.005 N/A 0.240 N/A 1.3 N/A 3.6 N/A 6.1
50-154 N/A 0.050 N/A 0.003 N/A 0.154 N/A 0.005 N/A 0.254 N/A 1.3 N/A 3.9 N/A 6.5
50-176 N/A 0.050 N/A 0.003 N/A 0.176 N/A 0.005 N/A 0.276 N/A 1.3 N/A 4.5 N/A 7.0
50-187 N/A 0.050 N/A 0.003 N/A 0.187 N/A 0.005 N/A 0.287 N/A 1.3 N/A 4.7 N/A 7.3
50-208 N/A 0.050 N/A 0.003 N/A 0.208 N/A 0.005 N/A 0.308 N/A 1.3 N/A 5.3 N/A 7.8
50-287 N/A 0.050 N/A 0.003 N/A 0.287 N/A 0.005 N/A 0.387 N/A 1.3 N/A 7.3 N/A 9.8
50-300 N/A 0.050 N/A 0.003 N/A 0.300 N/A 0.005 N/A 0.400 N/A 1.3 N/A 7.6 N/A 1.2
50-330 N/A 0.050 N/A 0.003 N/A 0.330 N/A 0.005 N/A 0.430 N/A 1.3 N/A 8.4 N/A 1.9
50-366SS N/A 0.050 N/A 0.003 N/A 0.369 N/A 0.005 N/A 0.469 N/A 1.3 N/A 9.4 N/A 11.9
50-397SS N/A 0.050 N/A 0.003 N/A 0.401 N/A 0.005 N/A 0.501 N/A 1.3 N/A 1.2 N/A 12.7
50-426 N/A 0.050 N/A 0.003 N/A 0.426 N/A 0.005 N/A 0.526 N/A 1.3 N/A 1.8 N/A 13.4
50-468 N/A 0.050 N/A 0.003 N/A 0.468 N/A 0.005 N/A 0.568 N/A 1.3 N/A 11.9 N/A 14.4
50-475SS N/A 0.050 N/A 0.003 N/A 0.4795 N/A 0.005 N/A 0.5795 N/A 1.3 N/A 12.2 N/A 14.7
50-590 N/A 0.050 N/A 0.003 N/A 0.590 N/A 0.007 N/A 0.690 N/A 1.3 N/A 15 N/A 17.5
50-625 N/A 0.050 N/A 0.003 N/A 0.625 N/A 0.009 N/A 0.725 N/A 1.3 N/A 15.9 N/A 18.4
50-720 N/A 0.050 N/A 0.003 N/A 0.720 N/A 0.009 N/A 0.820 N/A 1.3 N/A 18.3 N/A 2.8
Unit of Measure
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