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
Items Image
12-145
O-Ring, 0.012 C/S x 0.145 ID x 0.169 OD 		Image
16-47
O-Ring, 0.016 C/S x 0.047 ID x 0.079 OD 		Image
16-171
O-Ring, 0.016 C/S x 0.171 ID x 0.203 OD 		Image
16-175
O-Ring, 0.016 C/S x 0.175 ID x 0.207 OD 		Image
16-438
O-Ring, 0.016 C/S x 0.438 ID x 0.470 OD
C/S (inches) N/A 0.012 N/A 0.016 N/A 0.016 N/A 0.016 N/A 0.016
C/S Tolerance (±) N/A 0.003
I.D. (inches) N/A 0.145 N/A 0.047 N/A 0.171 N/A 0.175 N/A 0.438
I.D. Tolerance (±) N/A 0.005 N/A 0.004 N/A 0.005 N/A 0.005 N/A 0.005
Nominal C/S (inches) N/A
Nominal I.D. (inches) N/A
Nominal O.D. (inches) N/A
Metric C/S (mm) N/A 0.3 N/A 0.4 N/A 0.4 N/A 0.4 N/A 0.4
Metric I.D. (mm) N/A 3.7 N/A 1.2 N/A 4.3 N/A 4.4 N/A 11.1
Metric O.D. (mm) N/A 4.3 N/A 2 N/A 5.2 N/A 5.3 N/A 11.9
Material N/A Chloroprene Rubber (CR) (Neoprene®) Ethylene Propylene Diene Monomer (EPDM) Fluoroelastomer (FKM) Fluorosilicone Hydrogenated Nitrile Butadiene Rubber (HNBR) Hydrogenated Nitrile Butadiene Rubber (XNBR) Nitrile Butadiene Rubber (NBR) Perfluoroelastomer (FFKM) Silicone Tetrafluoroethylene Propylene (Aflas®) Urethane
Duro Range N/A 30 ±5 40 ±5 50 ±5 60 ±5 70 ±5 80 ±5 90 ±5
Class 7 Clean Room Medical Grade N/A Not Required Required