AS 568 O-Rings from PAI

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.

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Nominal C/S (inches)

Nominal I.D. (inches)

Nominal O.D. (inches)

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)

1-155	N/A 0.103	N/A 0.003	N/A 3.987	N/A 0.028	N/A 4.193	N/A 3/32	N/A 4	N/A 4 3/16	N/A 2.6	N/A 101.3	N/A 106.5
1-156	N/A 0.103	N/A 0.003	N/A 4.237	N/A 0.030	N/A 4.443	N/A 3/32	N/A 4 1/4	N/A 4 7/16	N/A 2.6	N/A 107.6	N/A 112.9
1-157	N/A 0.103	N/A 0.003	N/A 4.487	N/A 0.030	N/A 4.693	N/A 3/32	N/A 4.5	N/A 4 11/16	N/A 2.6	N/A 114.0	N/A 119.2
1-158	N/A 0.103	N/A 0.003	N/A 4.737	N/A 0.030	N/A 4.943	N/A 3/32	N/A 4 3/4	N/A 4 15/16	N/A 2.6	N/A 120.3	N/A 125.6
1-159	N/A 0.103	N/A 0.003	N/A 4.987	N/A 0.035	N/A 5.193	N/A 3/32	N/A 5	N/A 5 3/16	N/A 2.6	N/A 126.7	N/A 131.9
1-160	N/A 0.103	N/A 0.003	N/A 5.237	N/A 0.035	N/A 5.443	N/A 3/32	N/A 5 1/4	N/A 5 7/16	N/A 2.6	N/A 133.0	N/A 138.3
1-161	N/A 0.103	N/A 0.003	N/A 5.487	N/A 0.035	N/A 5.693	N/A 3/32	N/A 5 1/2	N/A 5 11/16	N/A 2.6	N/A 139.4	N/A 144.6
1-162	N/A 0.103	N/A 0.003	N/A 5.737	N/A 0.035	N/A 5.943	N/A 3/32	N/A 5 3/4	N/A 5 15/16	N/A 2.6	N/A 145.7	N/A 151.0
1-163	N/A 0.103	N/A 0.003	N/A 5.987	N/A 0.035	N/A 6.193	N/A 3/32	N/A 6	N/A 6 3/16	N/A 2.6	N/A 152.1	N/A 157.3
1-164	N/A 0.103	N/A 0.003	N/A 6.237	N/A 0.040	N/A 6.443	N/A 3/32	N/A 6 1/4	N/A 6 7/16	N/A 2.6	N/A 158.4	N/A 163.7
1-165	N/A 0.103	N/A 0.003	N/A 6.487	N/A 0.040	N/A 6.693	N/A 3/32	N/A 6 1/2	N/A 6 11/16	N/A 2.6	N/A 164.8	N/A 170.0
1-166	N/A 0.103	N/A 0.003	N/A 6.737	N/A 0.040	N/A 6.943	N/A 3/32	N/A 6 3/4	N/A 6 15/16	N/A 2.6	N/A 171.1	N/A 176.4
1-167	N/A 0.103	N/A 0.003	N/A 6.987	N/A 0.040	N/A 7.193	N/A 3/32	N/A 7	N/A 7 3/16	N/A 2.6	N/A 177.5	N/A 182.7
1-168	N/A 0.103	N/A 0.003	N/A 7.237	N/A 0.045	N/A 7.443	N/A 3/32	N/A 7 1/2	N/A 7 7/16	N/A 2.6	N/A 183.8	N/A 189.1
1-169	N/A 0.103	N/A 0.003	N/A 7.487	N/A 0.045	N/A 7.693	N/A 3/32	N/A 7 1/4	N/A 7 11/16	N/A 2.6	N/A 190.2	N/A 195.4
1-170	N/A 0.103	N/A 0.003	N/A 7.737	N/A 0.045	N/A 7.943	N/A 3/32	N/A 7 3/4	N/A 7 15/16	N/A 2.6	N/A 196.5	N/A 201.8
1-171	N/A 0.103	N/A 0.003	N/A 7.987	N/A 0.045	N/A 8.193	N/A 3/32	N/A 8	N/A 8 3/16	N/A 2.6	N/A 202.9	N/A 208.1
1-172	N/A 0.103	N/A 0.003	N/A 8.237	N/A 0.050	N/A 8.443	N/A 3/32	N/A 8 1/4	N/A 8 7/16	N/A 2.6	N/A 209.2	N/A 214.5
1-173	N/A 0.103	N/A 0.003	N/A 8.487	N/A 0.050	N/A 8.693	N/A 3/32	N/A 8 1/2	N/A 8 11/16	N/A 2.6	N/A 215.6	N/A 220.8
1-174	N/A 0.103	N/A 0.003	N/A 8.737	N/A 0.050	N/A 8.943	N/A 3/32	N/A 8 3/4	N/A 8 15/16	N/A 2.6	N/A 221.9	N/A 227.2
1-175	N/A 0.103	N/A 0.003	N/A 8.987	N/A 0.050	N/A 9.193	N/A 3/32	N/A 9	N/A 9 3/16	N/A 2.6	N/A 228.3	N/A 233.5
1-176	N/A 0.103	N/A 0.003	N/A 9.237	N/A 0.055	N/A 9.443	N/A 3/32	N/A 9 1/4	N/A 9 7/16	N/A 2.6	N/A 234.6	N/A 239.9
1-177	N/A 0.103	N/A 0.003	N/A 9.487	N/A 0.055	N/A 9.693	N/A 3/32	N/A 9 1/2	N/A 9 11/16	N/A 2.6	N/A 241.0	N/A 246.2
1-178	N/A 0.103	N/A 0.003	N/A 9.737	N/A 0.055	N/A 9.943	N/A 3/32	N/A 9 3/4	N/A 9 15/16	N/A 2.6	N/A 247.3	N/A 252.6
1-179	N/A 0.103	N/A 0.003	N/A 9.987	N/A 0.055	N/A 10.193	N/A 3/32	N/A 10	N/A 10 3/16	N/A 2.6	N/A 253.7	N/A 258.9

126 - 150 of 448 | Results Per Page | View | Unit of Measure

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No Preference
1/32
3/64
1/16
5/64
3/32
7/64
1/8
5/32
3/16
7/32
1/4
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
15/16
1
1 1/16
1 1/8
1 3/16
1 1/4
1 5/16
1 3/8
1 7/16
1 1/2
1 9/16
1 5/8
1 11/16
1 3/4
1 13/16
1 7/8
1 15/16
2
2 1/16
2 1/8
2 3/16
2 1/4
2 5/16
2 3/8
2 7/16
2 1/2
2 9/16
2 5/8
2 11/16
2 3/4
2 13/16
2 7/8
3
3 1/8
3 1/4
3 3/8
3 1/2
3 5/8
3 3/4
3 7/8
4
4 1/8
4 1/4
4 3/8
4 5/8
4 3/4
4 7/8
4.5
5
5 1/8
5 1/4
5 3/8
5 1/2
5 5/8
5 3/4
5 7/8
6
6 1/4
6 1/2
6 3/4
7
7 1/4
7 1/2
7 3/4
8
8 1/4
8 1/2
8 3/4
9
9 1/4
9 1/2
9 3/4
10
10 1/2
11
11 1/2
12
12 1/2
13
13 1/2
14
14 1/2
15
15 1/2
16
16 1/2
17
17 1/2
18
18 1/2
19
19 1/2
20
21
22
23
24
25
26
27

No Preference
3/32
9/64
11/64
13/64
15/64
1/4
9/32
5/16
11/32
3/8
13/32
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
15/16
1
1 1/16
1 1/8
1 3/16
1 1/4
1 5/16
1 3/8
1 7/16
1 1/2
1 9/16
1 5/8
1 11/16
1 3/4
1 13/16
1 7/8
1 15/16
2
2 1/16
2 1/8
2 3/16
2 1/4
2 5/16
2 3/8
2 7/16
2 1/2
2 9/16
2 5/8
2 11/16
2 3/4
2 13/16
2 7/8
2 15/16
3
3 1/16
3 1/8
3 3/16
3 1/4
3 5/16
3 3/8
3 7/16
3 1/2
3 9/16
3 5/8
3 11/16
3 3/4
3 13/16
3 7/8
3 15/16
4
4 1/16
4 1/8
4 3/16
4 1/4
4 5/16
4 3/8
4 7/16
4 1/2
4 9/16
4 5/8
4 11/16
4 3/4
4 13/16
4 7/8
4 15/16
5
5 1/16
5 1/8
5 3/16
5 1/4
5 3/8
5 7/16
5 1/2
5 5/8
5 11/16
5 3/4
5 7/8
5 15/16
6
6 1/8
6 3/16
6 1/4
6 3/8
6 7/16
6 1/2
6 5/8
6 11/16
6 3/4
6 7/8
6 15/16
7
7 1/8
7 3/16
7 1/4
7 3/8
7 7/16
7 1/2
7 5/8
7 11/16
7 3/4
7 7/8
7 15/16
8
8 1/8
8 3/16
8 1/4
8 3/8
8 7/16
8 1/2
8 5/8
8 11/16
8 3/4
8 7/8
8 15/16
9
9 1/8
9 3/16
9 1/4
9 3/8
9 7/16
9 1/2
9 5/8
9 11/16
9 3/4
9 7/8
9 15/16
10
10 1/8
10 3/16
10 1/4
10 3/8
10 1/2
10 3/4
10 7/8
11
11 1/4
11 3/8
11 1/2
11 3/4
11 7/8
12
12 1/4
12 3/8
12 1/2
13
13 1/4
13 3/8
13 1/2
14
14 1/4
14 3/8
14 1/2
15
15 1/4
15 3/8
15 1/2
16
16 1/4
16 3/8
16 1/2
17
17 1/4
17 3/8
17 1/2
18
18 1/4
18 3/8
18 1/2
19
19 3/8
19 1/2
20
20 1/4
20 3/8
20 1/2
21 3/8
21 1/2
22 3/8
22 1/2
23 3/8
23 1/2
24 3/8
24 1/2
25 3/8
25 1/2
26 3/8
26 1/2
27 3/8
27 1/2