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.

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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)

21-260 N/A 0.021 N/A 0.003 N/A 0.260 N/A 0.005 N/A 0.302 N/A 0.5 N/A 6.6 N/A 7.7
22-63 N/A 0.022 N/A 0.003 N/A 0.063 N/A 0.004 N/A 0.107 N/A 0.6 N/A 1.6 N/A 2.7
23-41 N/A 0.023 N/A 0.003 N/A 0.041 N/A 0.004 N/A 0.087 N/A 0.6 N/A 1.0 N/A 2.2
23-84 N/A 0.023 N/A 0.003 N/A 0.084 N/A 0.005 N/A 0.130 N/A 0.6 N/A 2.1 N/A 3.3
23-98 N/A 0.023 N/A 0.003 N/A 0.098 N/A 0.005 N/A 0.144 N/A 0.6 N/A 2.5 N/A 3.7
23-144 N/A 0.023 N/A 0.003 N/A 0.145 N/A 0.005 N/A 0.191 N/A 0.6 N/A 3.7 N/A 4.9
23-150ES N/A 0.023 N/A 0.003 N/A 0.151 N/A 0.005 N/A 0.197 N/A 0.6 N/A 3.8 N/A 5.0
23-191 N/A 0.023 N/A 0.003 N/A 0.191 N/A 0.005 N/A 0.237 N/A 0.6 N/A 4.9 N/A 6
23-200 N/A 0.023 N/A 0.003 N/A 0.202 N/A 0.005 N/A 0.248 N/A 0.6 N/A 5.1 N/A 6.3
24-169 N/A 0.024 N/A 0.003 N/A 0.169 N/A 0.005 N/A 0.217 N/A 0.6 N/A 4.3 N/A 5.5
24-205 N/A 0.024 N/A 0.003 N/A 0.205 N/A 0.005 N/A 0.253 N/A 0.6 N/A 5.2 N/A 6.4
24-472 N/A 0.024 N/A 0.003 N/A 0.472 N/A 0.005 N/A 0.520 N/A 0.6 N/A 12.0 N/A 13.2
24-945 N/A 0.024 N/A 0.003 N/A 0.945 N/A 0.009 N/A 0.993 N/A 0.6 N/A 24 N/A 25.2
25-70 N/A 0.025 N/A 0.003 N/A 0.070 N/A 0.005 N/A 0.120 N/A 0.6 N/A 1.8 N/A 3
25-90 N/A 0.025 N/A 0.003 N/A 0.090 N/A 0.005 N/A 0.140 N/A 0.6 N/A 2.3 N/A 3.6
25-130 N/A 0.025 N/A 0.003 N/A 0.130 N/A 0.005 N/A 0.180 N/A 0.6 N/A 3.3 N/A 4.6
25-137SS N/A 0.025 N/A 0.003 N/A 0.138 N/A 0.005 N/A 0.188 N/A 0.6 N/A 3.5 N/A 4.8
25-144 N/A 0.025 N/A 0.003 N/A 0.144 N/A 0.005 N/A 0.194 N/A 0.6 N/A 3.7 N/A 4.9
25-190SS N/A 0.025 N/A 0.003 N/A 0.196 N/A 0.005 N/A 0.246 N/A 0.6 N/A 5.0 N/A 6.2
25-218 N/A 0.025 N/A 0.003 N/A 0.218 N/A 0.005 N/A 0.268 N/A 0.6 N/A 5.5 N/A 6.8
25-237 N/A 0.025 N/A 0.003 N/A 0.237 N/A 0.005 N/A 0.287 N/A 0.6 N/A 6.0 N/A 7.3
25-285 N/A 0.025 N/A 0.003 N/A 0.285 N/A 0.005 N/A 0.335 N/A 0.6 N/A 7.2 N/A 8.5
25-301 N/A 0.025 N/A 0.003 N/A 0.301 N/A 0.005 N/A 0.351 N/A 0.6 N/A 7.6 N/A 8.9
25-507 N/A 0.025 N/A 0.003 N/A 0.507 N/A 0.005 N/A 0.557 N/A 0.6 N/A 12.9 N/A 14.1
25-1.110 N/A 0.025 N/A 0.003 N/A 1.110 N/A 0.010 N/A 1.160 N/A 0.6 N/A 28.2 N/A 29.5
Unit of Measure
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