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.

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)
1-211	N/A 0.139	N/A 0.004	N/A 0.796	N/A 0.010	N/A 1.074	N/A 1/8	N/A 13/16	N/A 1 1/16	N/A 3.5	N/A 20.2	N/A 27.3
1-212	N/A 0.139	N/A 0.004	N/A 0.859	N/A 0.010	N/A 1.137	N/A 1/8	N/A 7/8	N/A 1 1/8	N/A 3.5	N/A 21.8	N/A 28.9
1-213	N/A 0.139	N/A 0.004	N/A 0.921	N/A 0.010	N/A 1.199	N/A 1/8	N/A 15/16	N/A 1 3/16	N/A 3.5	N/A 23.4	N/A 30.5
1-214	N/A 0.139	N/A 0.004	N/A 0.984	N/A 0.010	N/A 1.262	N/A 1/8	N/A 1	N/A 1 1/4	N/A 3.5	N/A 25.0	N/A 32.1
1-215	N/A 0.139	N/A 0.004	N/A 1.046	N/A 0.010	N/A 1.324	N/A 1/8	N/A 1 1/16	N/A 1 5/16	N/A 3.5	N/A 26.6	N/A 33.6
1-216	N/A 0.139	N/A 0.004	N/A 1.109	N/A 0.012	N/A 1.387	N/A 1/8	N/A 1 1/8	N/A 1 3/8	N/A 3.5	N/A 28.2	N/A 35.2
1-217	N/A 0.139	N/A 0.004	N/A 1.171	N/A 0.012	N/A 1.449	N/A 1/8	N/A 1 3/16	N/A 1 7/16	N/A 3.5	N/A 29.7	N/A 36.8
1-218	N/A 0.139	N/A 0.004	N/A 1.234	N/A 0.012	N/A 1.512	N/A 1/8	N/A 1 1/4	N/A 1 1/2	N/A 3.5	N/A 31.3	N/A 38.4
1-219	N/A 0.139	N/A 0.004	N/A 1.296	N/A 0.012	N/A 1.574	N/A 1/8	N/A 1 5/16	N/A 1 9/16	N/A 3.5	N/A 32.9	N/A 40.0
1-220	N/A 0.139	N/A 0.004	N/A 1.359	N/A 0.012	N/A 1.637	N/A 1/8	N/A 1 3/8	N/A 1 5/8	N/A 3.5	N/A 34.5	N/A 41.6
1-221	N/A 0.139	N/A 0.004	N/A 1.421	N/A 0.012	N/A 1.699	N/A 1/8	N/A 1 7/16	N/A 1 11/16	N/A 3.5	N/A 36.1	N/A 43.2
1-222	N/A 0.139	N/A 0.004	N/A 1.484	N/A 0.015	N/A 1.762	N/A 1/8	N/A 1 1/2	N/A 1 3/4	N/A 3.5	N/A 37.7	N/A 44.8
1-223	N/A 0.139	N/A 0.004	N/A 1.609	N/A 0.015	N/A 1.887	N/A 1/8	N/A 1 5/8	N/A 1 7/8	N/A 3.5	N/A 40.9	N/A 47.9
1-224	N/A 0.139	N/A 0.004	N/A 1.734	N/A 0.015	N/A 2.012	N/A 1/8	N/A 1 3/4	N/A 2	N/A 3.5	N/A 44.0	N/A 51.1
1-225	N/A 0.139	N/A 0.004	N/A 1.859	N/A 0.018	N/A 2.137	N/A 1/8	N/A 1 7/8	N/A 2 1/8	N/A 3.5	N/A 47.2	N/A 54.3
1-226	N/A 0.139	N/A 0.004	N/A 1.984	N/A 0.018	N/A 2.262	N/A 1/8	N/A 2	N/A 2 1/4	N/A 3.5	N/A 50.4	N/A 57.5
1-227	N/A 0.139	N/A 0.004	N/A 2.109	N/A 0.018	N/A 2.387	N/A 1/8	N/A 2 1/8	N/A 2 3/8	N/A 3.5	N/A 53.6	N/A 60.6
1-228	N/A 0.139	N/A 0.004	N/A 2.234	N/A 0.020	N/A 2.512	N/A 1/8	N/A 2 1/4	N/A 2 1/2	N/A 3.5	N/A 56.7	N/A 63.8
1-229	N/A 0.139	N/A 0.004	N/A 2.359	N/A 0.020	N/A 2.637	N/A 1/8	N/A 2 3/8	N/A 2 5/8	N/A 3.5	N/A 59.9	N/A 67.0
1-230	N/A 0.139	N/A 0.004	N/A 2.484	N/A 0.020	N/A 2.762	N/A 1/8	N/A 2 1/2	N/A 2 3/4	N/A 3.5	N/A 63.1	N/A 70.2
1-231	N/A 0.139	N/A 0.004	N/A 2.609	N/A 0.020	N/A 2.887	N/A 1/8	N/A 2 5/8	N/A 2 7/8	N/A 3.5	N/A 66.3	N/A 73.3
1-232	N/A 0.139	N/A 0.004	N/A 2.734	N/A 0.024	N/A 3.012	N/A 1/8	N/A 2 3/4	N/A 3	N/A 3.5	N/A 69.4	N/A 76.5
1-233	N/A 0.139	N/A 0.004	N/A 2.859	N/A 0.024	N/A 3.137	N/A 1/8	N/A 2 7/8	N/A 3 1/8	N/A 3.5	N/A 72.6	N/A 79.7
1-234	N/A 0.139	N/A 0.004	N/A 2.984	N/A 0.024	N/A 3.262	N/A 1/8	N/A 3	N/A 3 1/4	N/A 3.5	N/A 75.8	N/A 82.9
1-235	N/A 0.139	N/A 0.004	N/A 3.109	N/A 0.024	N/A 3.387	N/A 1/8	N/A 3 1/8	N/A 3 3/8	N/A 3.5	N/A 79.0	N/A 86.0

1-211

N/A 0.139

N/A 0.004

N/A 0.796

N/A 0.010

N/A 1.074

N/A 1/8

N/A 13/16

N/A 1 1/16

N/A 3.5

N/A 20.2

N/A 27.3

1-212

N/A 0.139

N/A 0.004

N/A 0.859

N/A 0.010

N/A 1.137

N/A 1/8

N/A 7/8

N/A 1 1/8

N/A 3.5

N/A 21.8

N/A 28.9

1-213

N/A 0.139

N/A 0.004

N/A 0.921

N/A 0.010

N/A 1.199

N/A 1/8

N/A 15/16

N/A 1 3/16

N/A 3.5

N/A 23.4

N/A 30.5

1-214

N/A 0.139

N/A 0.004

N/A 0.984

N/A 0.010

N/A 1.262

N/A 1/8

N/A 1

N/A 1 1/4

N/A 3.5

N/A 25.0

N/A 32.1

1-215

N/A 0.139

N/A 0.004

N/A 1.046

N/A 0.010

N/A 1.324

N/A 1/8

N/A 1 1/16

N/A 1 5/16

N/A 3.5

N/A 26.6

N/A 33.6

1-216

N/A 0.139

N/A 0.004

N/A 1.109

N/A 0.012

N/A 1.387

N/A 1/8

N/A 1 1/8

N/A 1 3/8

N/A 3.5

N/A 28.2

N/A 35.2

1-217

N/A 0.139

N/A 0.004

N/A 1.171

N/A 0.012

N/A 1.449

N/A 1/8

N/A 1 3/16

N/A 1 7/16

N/A 3.5

N/A 29.7

N/A 36.8

1-218

N/A 0.139

N/A 0.004

N/A 1.234

N/A 0.012

N/A 1.512

N/A 1/8

N/A 1 1/4

N/A 1 1/2

N/A 3.5

N/A 31.3

N/A 38.4

1-219

N/A 0.139

N/A 0.004

N/A 1.296

N/A 0.012

N/A 1.574

N/A 1/8

N/A 1 5/16

N/A 1 9/16

N/A 3.5

N/A 32.9

N/A 40.0

1-220

N/A 0.139

N/A 0.004

N/A 1.359

N/A 0.012

N/A 1.637

N/A 1/8

N/A 1 3/8

N/A 1 5/8

N/A 3.5

N/A 34.5

N/A 41.6

1-221

N/A 0.139

N/A 0.004

N/A 1.421

N/A 0.012

N/A 1.699

N/A 1/8

N/A 1 7/16

N/A 1 11/16

N/A 3.5

N/A 36.1

N/A 43.2

1-222

N/A 0.139

N/A 0.004

N/A 1.484

N/A 0.015

N/A 1.762

N/A 1/8

N/A 1 1/2

N/A 1 3/4

N/A 3.5

N/A 37.7

N/A 44.8

1-223

N/A 0.139

N/A 0.004

N/A 1.609

N/A 0.015

N/A 1.887

N/A 1/8

N/A 1 5/8

N/A 1 7/8

N/A 3.5

N/A 40.9

N/A 47.9

1-224

N/A 0.139

N/A 0.004

N/A 1.734

N/A 0.015

N/A 2.012

N/A 1/8

N/A 1 3/4

N/A 2

N/A 3.5

N/A 44.0

N/A 51.1

1-225

N/A 0.139

N/A 0.004

N/A 1.859

N/A 0.018

N/A 2.137

N/A 1/8

N/A 1 7/8

N/A 2 1/8

N/A 3.5

N/A 47.2

N/A 54.3

1-226

N/A 0.139

N/A 0.004

N/A 1.984

N/A 0.018

N/A 2.262

N/A 1/8

N/A 2

N/A 2 1/4

N/A 3.5

N/A 50.4

N/A 57.5

1-227

N/A 0.139

N/A 0.004

N/A 2.109

N/A 0.018

N/A 2.387

N/A 1/8

N/A 2 1/8

N/A 2 3/8

N/A 3.5

N/A 53.6

N/A 60.6

1-228

N/A 0.139

N/A 0.004

N/A 2.234

N/A 0.020

N/A 2.512

N/A 1/8

N/A 2 1/4

N/A 2 1/2

N/A 3.5

N/A 56.7

N/A 63.8

1-229

N/A 0.139

N/A 0.004

N/A 2.359

N/A 0.020

N/A 2.637

N/A 1/8

N/A 2 3/8

N/A 2 5/8

N/A 3.5

N/A 59.9

N/A 67.0

1-230

N/A 0.139

N/A 0.004

N/A 2.484

N/A 0.020

N/A 2.762

N/A 1/8

N/A 2 1/2

N/A 2 3/4

N/A 3.5

N/A 63.1

N/A 70.2

1-231

N/A 0.139

N/A 0.004

N/A 2.609

N/A 0.020

N/A 2.887

N/A 1/8

N/A 2 5/8

N/A 2 7/8

N/A 3.5

N/A 66.3

N/A 73.3

1-232

N/A 0.139

N/A 0.004

N/A 2.734

N/A 0.024

N/A 3.012

N/A 1/8

N/A 2 3/4

N/A 3

N/A 3.5

N/A 69.4

N/A 76.5

1-233

N/A 0.139

N/A 0.004

N/A 2.859

N/A 0.024

N/A 3.137

N/A 1/8

N/A 2 7/8

N/A 3 1/8

N/A 3.5

N/A 72.6

N/A 79.7

1-234

N/A 0.139

N/A 0.004

N/A 2.984

N/A 0.024

N/A 3.262

N/A 1/8

N/A 3

N/A 3 1/4

N/A 3.5

N/A 75.8

N/A 82.9

1-235

N/A 0.139

N/A 0.004

N/A 3.109

N/A 0.024

N/A 3.387

N/A 1/8

N/A 3 1/8

N/A 3 3/8

N/A 3.5

N/A 79.0

N/A 86.0