O-Rings

O-Rings

Additional Information
There are several different standards to choose from when it comes to O-ring dimensions.  The most popular in the United States is the AS568 standard for O-ring sizes and tolerances.  Maintained by the Society of Automotive Engineers, this standard allows the user to choose from five different cross-sections with inside diameters ranging from 1/32" to 26". Tube fitting boss seals are included in AS568 as 900 series O-ring sizes, and are intended for use in MS33649 (now superseded by SAE-AS5202) straight thread tube fitings. 

RT/Dygert also offers a wide array of metric sizes, in both standard and non-standard dimensions.  As a subset of the metric sizes offered, we also stock many Japanese Industrial Standard (JIS B2401) sizes. If an O-ring with special size or fluid resistance is required, RT/Dygert can provide custom O-rings, specially made to your demanding requirements.
SIZES
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Fit Groove Size
O.D.
AS568A
Dash No.
C/S
I.D.
Metric
Dimensions in Inches Nominal Size (Reference Only)
ID AS568A I.D. ± C/S Vol (in3) I.D. O.D. C/S
1484 425 4.475 .033 .275 ± .006 .8863 4-1/2 5 1/4
1485 426 4.6 .033 .275 ± .006 .9097 4-5/8 5-1/8 1/4
1486 427 4.725 .033 .275 ± .006 .9330 4-3/4 5-1/4 1/4
1487 428 4.85 .033 .275 ± .006 .9563 4-7/8 5-3/8 1/4
1488 429 4.975 .037 .275 ± .006 .9796 5 5-1/2 1/4
1489 430 5.1 .037 .275 ± .006 1.0030 5-1/8 5-5/8 1/4
1490 431 5.225 .037 .275 ± .006 1.0263 5-1/4 5-3/4 1/4
1491 432 5.35 .037 .275 ± .006 1.0496 5-3/8 5-7/8 1/4
1492 433 5.475 .037 .275 ± .006 1.0729 5-1/2 6 1/4
1493 434 5.6 .037 .275 ± .006 1.0962 5-5/8 6-1/8 1/4
1494 435 5.725 .037 .275 ± .006 1.1196 5-3/4 6-1/4 1/4
1495 436 5.85 .037 .275 ± .006 1.1429 5-7/8 6-3/8 1/4
1496 437 5.975 .037 .275 ± .006 1.1662 6 6-1/2 1/4
1497 438 6.225 .040 .275 ± .006 1.2129 6-1/4 6-3/4 1/4
1498 439 6.475 .040 .275 ± .006 1.2595 6-1/2 7 1/4
1499 440 6.725 .040 .275 ± .006 1.3062 6-3/4 7-1/4 1/4
1500 441 6.975 .040 .275 ± .006 1.3528 7 7-1/2 1/4
1501 442 7.225 .045 .275 ± .006 1.3995 7-1/4 7-3/4 1/4
1502 443 7.475 .045 .275 ± .006 1.4461 7-1/2 8 1/4
1503 444 7.725 .045 .275 ± .006 1.4928 7-3/4 8-1/4 1/4
1504 445 7.975 .045 .275 ± .006 1.5394 8 8-1/2 1/4
1505 446 8.475 .035 .275 ± .006 1.6327 8-1/2 9 1/4
1506 447 8.975 .055 .275 ± .006 1.7260 9 9-1/2 1/4
1507 448 9.475 .055 .275 ± .006 1.8193 9-1/2 10 1/4
1508 449 9.975 .055 .275 ± .006 1.9126 10 10-1/2 1/4
1509 450 10.475 .060 .275 ± .006 2.0059 10-1/2 11 1/4
1510 451 10.975 .060 .275 ± .006 2.0092 11 11-1/2 1/4
1511 452 11.475 .060 .275 ± .006 2.1925 11-1/2 12 1/4
1512 453 11.975 .060 .275 ± .006 2.2858 12 12-1/2 1/4
1513 454 12.475 .060 .275 ± .006 2.3791 12-1/2 13 1/4
1514 455 12.975 .060 .275 ± .006 2.4724 13 13-1/2 1/4
1515 456 13.475 .070 .275 ± .006 2.5657 13-1/2 14 1/4
1516 457 13.975 .070 .275 ± .006 2.6590 14 14-1/2 1/4
1517 458 14.475 .070 .275 ± .006 2.7523 14-1/2 15 1/4
1518 459 14.975 .070 .275 ± .006 2.8456 15 15-1/2 1/4
1519 460 15.475 .070 .275 ± .006 2.9389 15-1/2 16 1/4
1520 461 15.955 .075 .275 ± .006 3.0285 16 16-1/2 1/4
1521 462 16.455 .075 .275 ± .006 3.1218 16-1/2 17 1/4
1522 463 16.955 .080 .275 ± .006 3.2151 17 17-1/2 1/4
1523 464 17.455 .085 .275 ± .006 3.3084 17-1/2 18 1/4
1524 465 17.955 .085 .275 ± .006 3.4017 18 18-1/2 1/4
1525 466 18.455 .085 .275 ± .006 3.4950 18-1/2 19 1/4
1526 467 18.955 .090 .275 ± .006 3.5883 19 19-1/2 1/4
1527 468 19.455 .090 .275 ± .006 3.6816 19-1/2 20 1/4
1528 469 19.955 .095 .275 ± .006 3.7749 20 20-1/2 1/4
1529 470 20.955 .095 .275 ± .006 3.9615 21 21-1/2 1/4
1530 471 21.955 .100 .275 ± .006 4.1481 22 22-1/2 1/4
1531 472 22.94 .105 .275 ± .006 4.3319 23 23-1/2 1/4
1532 473 23.94 .110 .275 ± .006 4.5185 24 24-1/2 1/4
1533 474 24.94 .115 .275 ± .006 4.7051 25 25-1/2 1/4
1534 475 25.94 .120 .275 ± .006 4.8917 26 26-1/2 1/4
MATERIALS
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