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.210" Cross Section O-Rings (Nominal Size 3/16" Cross Section)

.070" Cross Section
.210" Cross Section
.103" Cross Section
.275" Cross Section
.139" Cross Section
All Other O-Rings
 
-Actual Inches
Actual Millimeters
AS 568
Dash #
Inside
Diameter
Tol.
Cross
Section
Tol.
Inside
Diameter
Tol.
Cross
Section
Tol.
-309
.412
.005
.210
.005
10.46
0.13
5.33
0.13
-310
.475
.005
.210
.005
12.07
0.13
5.33
0.13
-311
.537
.007
.210
.005
13.64
0.18
5.33
0.13
-312
.600
.009
.210
.005
15.24
0.23
5.33
0.13
-313
.662
.009
.210
.005
16.81
0.23
5.33
0.13
-314
.725
.010
.210
.005
18.42
0.25
5.33
0.13
-315
.787
.010
.210
.005
19.99
0.25
5.33
0.13
-316
.850

.010

.210
.005
21.59
0.25
5.33
0.13
-317
.912
.010
.210
.005
23.16
0.25
5.33
0.13
-318
.975
.010
.210
.005
24.77
0.25
5.33
0.13
-319
1.034
.010
.210
.005
26.26
0.25
5.33
0.13
-320
1.100
.012
.210
.005
27.94
0.30
5.33
0.13
-321
1.162
.012
.210
.005
29.51
0.30
5.33
0.13
-322
1.225
.012
.210
.005
31.12
0.30
5.33
0.13
-323
1.287
.012
.210
.005
32.69
0.30
5.33
0.13
-324
1.350
.012
.210
.005
34.29
0.30
5.33
0.13
-325
1.475
.015
.210
.005
37.47
0.38
5.33
0.13
-326
1.600
.015
.210
.005
40.64
0.38
5.33
0.13
-327
1.725
.015
.210
.005
43.82
0.38
5.33
0.13
-328
1.850
.015
.210
.005
46.99
0.38
5.33
0.13
-329
1.975
.018
.210
.005
50.17
0.46
5.33
0.13
-330
2.100
.018
.210
.005
53.34
0.46
5.33
0.13
-331
2.225
.018
.210
.005
56.52
0.46
5.33
0.13
-332
2.350
.018
.210
.005
59.69
0.46
5.33
0.13
-333
2.475
.020
.210
.005
62.87
0.51
5.33
0.13
-334
2.600
.020
.210
.005
66.04
0.51
5.33
0.13
-335
2.725
.020
.210
.005
69.22
0.51
5.33
0.13
-336
2.850
.020
.210
.005
72.39
0.51
5.33
0.13
-337
2.975
.024
.210
.005
75.57
0.61
5.33
0.13
-338
3.100
.024
.210
.005
78.74
0.61
5.33
0.13
-339
3.225
.024
.210
.005
81.92
0.61
5.33
0.13
-340
3.350
.024
.210
.005
85.09
0.61
5.33
0.13
-341
3.475
.024
.210
.005
88.27
0.61
5.33
0.13
-342
3.600
.028
.210
.005
91.44
0.71
5.33
0.13
-343
3.725
.028
.210
.005
94.62
0.71
5.33
0.13
-344
3.850
.028
.210
.005
97.79
0.71
5.33
0.13
-345
3.975
.028
.210
.005
100.97
0.71
5.33
0.13
-346
4.100
.028
.210
.005
104.14
0.71
5.33
0.13
-347
4.225
.030
.210
.005
107.32
0.76
5.33
0.13
-348
4.350
.030
.210
.005
110.49
0.76
5.33
0.13
-349
4.475
.030
.210
.005
113.67
0.76
5.33
0.13
-350
4.600
.030
.210
.005
116.84
0.76
5.33
0.13
-351
4.725
.030
.210
.005
120.02
0.76
5.33
0.13
-352
4.850
.030
.210
.005
123.19
0.76
5.33
0.13
-353
4.975
.037
.210
.005
126.37
0.94
5.33
0.13
-354
5.100
.037
.210
.005
129.54
0.94
5.33
0.13
-355
5.225
.037
.210
.005
132.72
0.94
5.33
0.13
-356
5.350
.037
.210
.005
135.89
0.94
5.33
0.13
-357
5.475
.037
.210
.005
139.07
0.94
5.33
0.13
-358
5.600
.037
.210
.005
142.24
0.94
5.33
0.13
-359
5.725
.037
.210
.005
145.42
0.94
5.33
0.13
-360
5.850
.037
.210
.005
148.59
0.94
5.33
0.13
-361
5.975
.037
.210
.005
151.77
0.94
5.33
0.13
-362
6.225
.040
.210
.005
158.12
1.02
5.33
0.13
-363
6.475
.040
.210
.005
164.47
1.02
5.33
0.13
-364
6.725
.040
.210
.005
170.82
1.02
5.33
0.13
-365
6.975
.040
.210
.005
177.17
1.02
5.33
0.13
-366
7.225
.045
.210
.005
183.52
1.14
5.33
0.13
-367
7.475
.045
.210
.005
189.87
1.14
5.33
0.13
-368
7.725
.045
.210
.005
196.22
1.14
5.33
0.13
-369
7.975
.045
.210
.005
202.57
1.14
5.33
0.13
-370
8.225
.050
.210
.005
208.92
1.27
5.33
0.13
-371
8.475
.050
.210
.005
215.27
1.27
5.33
0.13
-372
8.725
.050
.210
.005
221.62
1.27
5.33
0.13
-373
8.975
.050
.210
.005
227.97
1.27
5.33
0.13
-374
9.225
.055
.210
.005
234.32
1.40
5.33
0.13
-375
9.475
.055
.210
.005
240.67
1.40
5.33
0.13
-376
9.725
.055
.210
.005
247.02
1.40
5.33
0.13
-377
9.925
.055
.210
.005
253.37
1.40
5.33
0.13
-378
10.475
.060
.210
.005
266.07
1.52
5.33
0.13
-379
10.975
.060
.210
.005
278.77
1.52
5.33
0.13
-380
11.475
.065
.210
.005
291.47
1.65
5.33
0.13
-381
11.975
.065
.210
.005
304.17
1.65
5.33
0.13
-382
12.975
.065
.210
.005
329.57
1.65
5.33
0.13
-383
13.975
.070
.210
.005
354.97
1.78
5.33
0.13
-384
14.975
.070
.210
.005
380.37
1.78
5.33
0.13
-385
15.955
.075
.210
.005
405.26
1.91
5.33
0.13
-386
16.955
.075
.210
.005
430.66
1.91
5.33
0.13
-387
17.955
.085
.210
.005
456.06
2.16
5.33
0.13
-388
18.955
.090
.210
.005
481.46
2.29
5.33
0.13
-389
19.955
.095
.210
.005
506.86
2.41
5.33
0.13
-390
20.955
.095
.210
.005
532.26
2.41
5.33
0.13
A full part number is generated by inserting the material identifier between AS568- and -*** with *** being the size of the O-Ring. Some examples of the many materials we can make any of these O-Rings in are:
Examples of Some Common Material Identifiers
NE50: Neoprene, 50 Durometer
NE70: Neoprene, 70 Durometer
NI60: Nitrile (Buna-N), 60 Durometer
EP60: EPDM, 60 Durometer
1056: Silver Plated Aluminum filled Silicone
1167: Silver Plated Copper filled Fluorosilicone
FS70: Fluorosilicone, 70 Durometer
SI70: Silicone, 70 Durometer
Examples of full part numbers are:

AS568-SI70-371 - This indicates a -371 size, as per the chart above, in a 70 Durometer Silicone

1056-0390 - This indicates a -390 size, as per the chart above, in a Silver Plated Aluminum filled Silicone (see EMI/RFI Shielding section for more information)
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