13
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METRIC
INCH
STANDARD
NOMINAL SIZE
STANDARD
(MM)
I.D.
O.D.
C.S.
I.D.
±
I.D.
±
MS 28775
MS 29513
AN 6227B MS 29561 AN 123856
1
AND
MS 9021
TO
AN 6230B MS 9068 AN 123934
NAS 1593
NAS 1594
AS-568A
NAS 1611
UNIVERSAL
DASH
PART
DASH
PART
NUMBERS NUMBERS NUMBERS NUMBERS
-361
-361*††
6
x6-3/8
x3/16
5.975 .037 151.77 0.94
-362
-362*††
6-1/4
x6-5/8
x3/16
6.225 .040 158.12 1.02
-363
-363*††
6-1/2
x6-7/8
x3/16
6.475 .040 164.47 1.02
-364
-364*††
6-3/4
x7-1/8
x3/16
6.725 .040 170.82 1.02
-365
-365*††
7
x7-3/8
x3/16
6.975 .040 177.17 1.02
-366
-366*††
7-1/4
x7-5/8
x3/16
7.225 .045 183.52 1.14
-367
-367*††
7-1/2
x7-7/8
x3/16
7.475 .045 189.87 1.14
-368
-368*††
7-3/4
x8-1/8
x3/16
7.725 .045 196.22 1 14
-369
-369*††
8
x8-3/8
x3/16
7.975 .045 202.57 1.14
-370
-370*††
8-1/4
x8-5/8
x3/16
8.225 .050 208.92 1.27
-371
-371*††
8-1/2
x8-7/8
x3/16
8.475 .050 215.27 1.27
-372
-372*††
8-3/4
x9-1/8
x3/16
8.725 .050 221.62 1.27
-373
-373*††
9
x9-3/8
x3/16
8.975 .050 227.97 1.27
-374
-374*††
9-1/4
x9-5/8
x3/16
9.225 .055 234.32 1.40
-375
-375*††
9-1/2
x9-7/8
x3/16
9.475 .055 240.67 1.40
-376
-376*††
9-3/4
x10-1/8 x3/16
9.725 .055 247.02 1.40
-377
-377*††
10
x10-3/8 x3/16
9.975 .055 253.37 1.40
-378
-378*††
10-1/2 x10-7/8 x3/16 10.475 .060 266.07 1.52
-379
-379*††
11
x11-3/8 x3/16 10.975 .060 278.77 1.52
-380
-380*††
11-1/2 x11-7/8
x3/16 11.475 .065 291.47 1.65
-381
-381*††
12
x12-3/8 x3/16 11.975 .065 304.17 1.65
-382
-382*††
13
x13-3/8 x3/16 12.975
.065 329.57 1.65
-383
-383*††
14
x14-3/8 x3/16 13.975 .070 354.97 1.78
-384
-384*††
15
x15-3/8
x3/16 14.975 .070 380.37 1.78
-385
-385*††
16
x16-3/8 x3/16 15.955 .075 405.26 1.90
-386
-386*††
17
x17-3/8 x3/16 16.955 .080 430.66 2.03
-387
-387*††
18
x18-3/8 x3/16 17.955 .085 456.06 2.16
-388
-388*††
19
x19-3/8 x3/16 18.955 .090 481.38 2.29
-389
-389*††
20
x20-3/8 x3/16 19.955 .095 506.78 2.41
-390
-390*††
21
x21-3/8 x3/16 20.955 .095 532.18 2.41
-391
-391*††
22
x22-3/8 x3/16 21.955 .095 557.58 2.41
-392
-392*††
23
x23-3/8 x3/16 22.940 .105 582.68 2.67
-393
-393*††
24
x24-3/8 x3/16 23.940 .110 608.08 2.79
-394
-394*††
25
x25-3/8 x3/16 24.940 .115 633.48 2.92
-395
-395*††
26
x26-3/8 x3/16 25.940 .120 658.88 3.05
-400***
1-3/8
x1-7/8 x1/4
1.350 .014
34.29 0.36
-401***
1-1/2
x2
x1/4
1.475 .014
37.47 0.36
-402***
1-5/8
x2-1/8 x1/4
1.600 .015
40.64 0.38
-403***
1-3/4
x2-1/4 x1/4
1.725 .016
43.82 0.41
-404***
1-7/8
x2-3/8 x1/4
1.850 .017
46.99 0.43
-309 to -395 Cross Section Diameters = .210 ± .005 inches — 5.33 ± 0.13 millimeters.
1 For AN 123956 to AN 124034, add 100 to part numbers shown in this column.
* These dash numbers are not included in MS 28775, MS 29561 or NAS 1611 series.
*** Dash numbers 400-424 are not listed on AS 568A, but are stock items at American Packing in selected compounds.
†† These dash numbers are not included in MS 9068, NAS 1593 or NAS 1594.
Standard O-Ring Sizes and Dimensions (Continued)
-400 to -424 Cross Section Diameters = .275 ± .006 inches — 6.99 ± 0.15 millimeters.
NOTES: (1) “AN”, “MS”, and “NAS” information is for size cross-reference only. “AN”, “MS”, and “NAS” O-Rings require special compounds. APG O-Rings are available in a variety of
compounds.
(2) Actual dimensions for standard (AN) shrinkage materials only. These correspond to AS568A dimensions. O-Rings manufactured out of compounds with different shrinkage
rates (other than AN) will produce slightly different dimensions and tolerances.