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)

103-3.612 N/A 0.103 N/A 0.003 N/A 3.612 N/A 0.024 N/A 3.818 N/A 2.6 N/A 91.7 N/A 97
103-3.837 N/A 0.103 N/A 0.003 N/A 3.837 N/A 0.028 N/A 4.043 N/A 2.6 N/A 97.5 N/A 102.7
103-3.875 N/A 0.103 N/A 0.003 N/A 3.8909 N/A 0.028 N/A 4.0969 N/A 2.6 N/A 98.8 N/A 104.1
103-4.093 N/A 0.103 N/A 0.003 N/A 4.093 N/A 0.028 N/A 4.299 N/A 2.6 N/A 104 N/A 109.2
103-4.109 N/A 0.103 N/A 0.003 N/A 4.109 N/A 0.028 N/A 4.315 N/A 2.6 N/A 104.4 N/A 109.6
103-4.169 N/A 0.103 N/A 0.003 N/A 4.169 N/A 0.028 N/A 4.375 N/A 2.6 N/A 105.9 N/A 111.1
103-4.175 N/A 0.103 N/A 0.003 N/A 4.175 N/A 0.028 N/A 4.381 N/A 2.6 N/A 106 N/A 111.3
103-4.350 N/A 0.103 N/A 0.003 N/A 4.350 N/A 0.030 N/A 4.556 N/A 2.6 N/A 11.5 N/A 115.7
103-4.397 N/A 0.103 N/A 0.003 N/A 4.397 N/A 0.030 N/A 4.603 N/A 2.6 N/A 111.7 N/A 116.9
103-4.612 N/A 0.103 N/A 0.003 N/A 4.612 N/A 0.030 N/A 4.818 N/A 2.6 N/A 117.1 N/A 122.4
103-4.859 N/A 0.103 N/A 0.003 N/A 4.859 N/A 0.030 N/A 5.065 N/A 2.6 N/A 123.4 N/A 128.7
103-4.930 N/A 0.103 N/A 0.003 N/A 4.930 N/A 0.030 N/A 5.136 N/A 2.6 N/A 125.2 N/A 13.5
103-5.106 N/A 0.103 N/A 0.003 N/A 5.106 N/A 0.035 N/A 5.312 N/A 2.6 N/A 129.7 N/A 134.9
103-5.117 N/A 0.103 N/A 0.003 N/A 5.117 N/A 0.035 N/A 5.323 N/A 2.6 N/A 130 N/A 135.2
103-5.290ES N/A 0.103 N/A 0.003 N/A 5.303 N/A 0.035 N/A 5.509 N/A 2.6 N/A 134.7 N/A 139.9
103-5.602 N/A 0.103 N/A 0.003 N/A 5.602 N/A 0.035 N/A 5.808 N/A 2.6 N/A 142.3 N/A 147.5
103-6.125 N/A 0.103 N/A 0.003 N/A 6.125 N/A 0.035 N/A 6.331 N/A 2.6 N/A 155.6 N/A 16.8
103-6.380 N/A 0.103 N/A 0.003 N/A 6.380 N/A 0.040 N/A 6.586 N/A 2.6 N/A 162.1 N/A 167.3
103-7.416 N/A 0.103 N/A 0.003 N/A 7.435 N/A 0.045 N/A 7.641 N/A 2.6 N/A 188.8 N/A 194.1
103-7.862 N/A 0.103 N/A 0.003 N/A 7.862 N/A 0.045 N/A 8.068 N/A 2.6 N/A 199.7 N/A 204.9
103-10.450ES N/A 0.103 N/A 0.003 N/A 10.487 N/A 0.055 N/A 10.693 N/A 2.6 N/A 266.4 N/A 271.6
103-10.984 N/A 0.103 N/A 0.003 N/A 10.984 N/A 0.060 N/A 11.190 N/A 2.6 N/A 279.0 N/A 284.2
103-11.239NS N/A 0.103 N/A 0.003 N/A 11.1904 N/A 0.065 N/A 11.3964 N/A 2.6 N/A 284.2 N/A 289.5
103-11.897NS N/A 0.103 N/A 0.003 N/A 11.8456 N/A 0.065 N/A 12.0516 N/A 2.6 N/A 30.9 N/A 306.1
103-374VS N/A 0.104 N/A 0.003 N/A 0.378 N/A 0.005 N/A 0.586 N/A 2.6 N/A 9.6 N/A 14.9
Unit of Measure
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