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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Explore our AS-568 & Extended Standard Size O-Rings including our new 5/32" Nominal Cross Section O-Rings. Precision Associates' O-Rings are available off the shelf in several standard compounds. Or try O-Rings in one of 1,200+ specialty materials in 20 polymer groups, including Viton®, AFLAS®, EPDM, Nitrile, HNBR (HSN), XNBR, Neoprene®, Butyl, XNBR, Silicone, Fluorosilicone, Perfluoroelastomer, Urethane, Hypalon®, and Hydrin®.

Click here to view our 48 (5Mb) Catalog illustrated with full-size drawings of Standard Size O-Rings plus Dimensions and Tolerances.
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)

Nominal C/S (inches)

Nominal I.D. (inches)

Nominal O.D. (inches)

Metric C/S (mm)

Metric I.D. (mm)

Metric O.D. (mm)

1-532 N/A 0.176 N/A 0.005 N/A 2.100 N/A 0.018 N/A 2.452 N/A 5/32 N/A 2 1/8 N/A 2 7/16 N/A 4.5 N/A 53.3 N/A 62.3
1-534 N/A 0.176 N/A 0.005 N/A 2.225 N/A 0.018 N/A 2.577 N/A 5/32 N/A 2 1/4 N/A 2 9/16 N/A 4.5 N/A 56.5 N/A 65.5
1-536 N/A 0.176 N/A 0.005 N/A 2.350 N/A 0.018 N/A 2.702 N/A 5/32 N/A 2 3/8 N/A 2 11/16 N/A 4.5 N/A 59.7 N/A 68.6
1-538 N/A 0.176 N/A 0.005 N/A 2.475 N/A 0.020 N/A 2.827 N/A 5/32 N/A 2 1/2 N/A 2 13/16 N/A 4.5 N/A 62.9 N/A 71.8
1-540 N/A 0.176 N/A 0.005 N/A 2.600 N/A 0.020 N/A 2.952 N/A 5/32 N/A 2 5/8 N/A 2 15/16 N/A 4.5 N/A 66.0 N/A 75.0
1-542 N/A 0.176 N/A 0.005 N/A 2.725 N/A 0.020 N/A 3.077 N/A 5/32 N/A 2 3/4 N/A 3 1/16 N/A 4.5 N/A 69.2 N/A 78.2
1-544 N/A 0.176 N/A 0.005 N/A 2.850 N/A 0.020 N/A 3.202 N/A 5/32 N/A 2 7/8 N/A 3 3/16 N/A 4.5 N/A 72.4 N/A 81.3
1-546 N/A 0.176 N/A 0.005 N/A 2.975 N/A 0.024 N/A 3.327 N/A 5/32 N/A 3 N/A 3 5/16 N/A 4.5 N/A 75.6 N/A 84.5
1-548 N/A 0.176 N/A 0.005 N/A 3.100 N/A 0.024 N/A 3.452 N/A 5/32 N/A 3 1/8 N/A 3 7/16 N/A 4.5 N/A 78.7 N/A 87.7
1-550 N/A 0.176 N/A 0.005 N/A 3.225 N/A 0.024 N/A 3.577 N/A 5/32 N/A 3 1/4 N/A 3 9/16 N/A 4.5 N/A 81.9 N/A 90.9
1-552 N/A 0.176 N/A 0.005 N/A 3.350 N/A 0.024 N/A 3.702 N/A 5/32 N/A 3 3/8 N/A 3 11/16 N/A 4.5 N/A 85.1 N/A 94.0
1-554 N/A 0.176 N/A 0.005 N/A 3.475 N/A 0.024 N/A 3.827 N/A 5/32 N/A 3 1/2 N/A 3 13/16 N/A 4.5 N/A 88.3 N/A 97.2
1-556 N/A 0.176 N/A 0.005 N/A 3.600 N/A 0.028 N/A 3.952 N/A 5/32 N/A 3 5/8 N/A 3 15/16 N/A 4.5 N/A 91.4 N/A 100.4
1-558 N/A 0.176 N/A 0.005 N/A 3.725 N/A 0.028 N/A 4.077 N/A 5/32 N/A 3 3/4 N/A 4 1/16 N/A 4.5 N/A 94.6 N/A 103.6
1-560 N/A 0.176 N/A 0.005 N/A 3.850 N/A 0.028 N/A 4.202 N/A 5/32 N/A 3 7/8 N/A 4 3/16 N/A 4.5 N/A 97.8 N/A 106.7
1-562 N/A 0.176 N/A 0.005 N/A 3.975 N/A 0.028 N/A 4.327 N/A 5/32 N/A 4 N/A 4 5/16 N/A 4.5 N/A 101.0 N/A 109.9
1-563 N/A 0.176 N/A 0.005 N/A 4.100 N/A 0.028 N/A 4.452 N/A 5/32 N/A 4 1/8 N/A 4 7/16 N/A 4.5 N/A 104.1 N/A 113.1
1-565 N/A 0.176 N/A 0.005 N/A 4.225 N/A 0.030 N/A 4.577 N/A 5/32 N/A 4 1/4 N/A 4 9/16 N/A 4.5 N/A 107.3 N/A 116.3
1-566 N/A 0.176 N/A 0.005 N/A 4.350 N/A 0.030 N/A 4.702 N/A 5/32 N/A 4 3/8 N/A 4 11/16 N/A 4.5 N/A 110.5 N/A 119.4
1-568 N/A 0.176 N/A 0.005 N/A 4.475 N/A 0.030 N/A 4.827 N/A 5/32 N/A 4.5 N/A 4 13/16 N/A 4.5 N/A 113.7 N/A 122.6
1-569 N/A 0.176 N/A 0.005 N/A 4.600 N/A 0.030 N/A 4.952 N/A 5/32 N/A 4 5/8 N/A 4 15/16 N/A 4.5 N/A 116.8 N/A 125.8
1-571 N/A 0.176 N/A 0.005 N/A 4.725 N/A 0.030 N/A 5.077 N/A 5/32 N/A 4 3/4 N/A 5 1/16 N/A 4.5 N/A 120.0 N/A 129.0
1-572 N/A 0.176 N/A 0.005 N/A 4.850 N/A 0.030 N/A 5.202 N/A 5/32 N/A 4 7/8 N/A 5 3/16 N/A 4.5 N/A 123.2 N/A 132.1
Unit of Measure
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