O-Ring Sizes
O-Ring sizes and dimensions BS1806 - AS568A |
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Materials | ||
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NBR | FKM/VIT | EPDM |
HNBR | FFKM | Neoprene |
PTFE | Silicone | Fluorosilicone |
Other materials are available on request
1/4" cross section | ||||||
---|---|---|---|---|---|---|
6.99mm ± 0.15mm 0.275"± 0.006" | ||||||
Internal diameter | Nominal size | |||||
Part No. (BS) | mm | Tol ± | Inch | Tol ± | Shaft | Bore |
425 | 113.67 | 0.38 | 4.475 | 0.015 | 4.1/2 | 5 |
624 | 114.70 | 0.38 | 4.516 | 0.015 | 4.9/16 | 5.1/16 |
426 | 116.84 | 0.38 | 4.600 | 0.015 | 4.5/8 | 5.1/8 |
427 | 120.02 | 0.38 | 4.725 | 0.015 | 4.3/4 | 5.1/4 |
428 | 123.20 | 0.38 | 4.850 | 0.015 | 4.7/8 | 5.3/8 |
625 | 124.60 | 0.38 | 4.906 | 0.015 | - | - |
429 | 126.37 | 0.38 | 4.975 | 0.015 | 5 | 5.1/2 |
430 | 129.54 | 0.58 | 5.100 | 0.023 | 5.1/8 | 5.5/8 |
431 | 132.72 | 0.58 | 5.225 | 0.023 | 5.1/4 | 5.3/4 |
626 | 134.50 | 0.58 | 5.297 | 0.023 | - | - |
432 | 135.90 | 0.58 | 5.350 | 0.023 | 5.3/8 | 5.7/8 |
433 | 139.07 | 0.58 | 5.475 | 0.023 | 5.1/2 | 6 |
434 | 142.24 | 0.58 | 5.600 | 0.023 | 5.5/8 | 6.1/8 |
435 | 145.42 | 0.58 | 5.725 | 0.023 | 5.3/4 | 6.1/4 |
436 | 148.60 | 0.58 | 5.850 | 0.023 | 5.7/8 | 6.3/8 |
437 | 151.77 | 0.58 | 5.975 | 0.023 | 6 | 6.1/2 |
872 | 155.60 | 0.58 | 6.126 | 0.023 | 6.1/8 | 6.5/8 |
438 | 158.12 | 0.58 | 6.225 | 0.023 | 6.1/4 | 6.3/4 |
627 | 159.50 | 0.58 | 6.281 | 0.023 | - | - |
874 | 161.90 | 0.58 | 6.375 | 0.023 | - | - |
439 | 164.47 | 0.58 | 6.475 | 0.023 | 6.1/2 | 7 |
628 | 166.70 | 0.58 | 6.563 | 0.023 | 6.9/16 | 7.1/16 |
876 | 168.30 | 0.58 | 6.625 | 0.023 | 6.5/8 | 7.1/8 |
440 | 170.82 | 0.58 | 6.725 | 0.023 | 6.3/4 | 7.1/4 |
878 | 174.60 | 0.58 | 6.875 | 0.023 | - | - |
441 | 177.17 | 0.58 | 6.975 | 0.023 | 7 | 7.1/2 |
441A | 181.00 | 0.76 | 7.125 | 0.030 | - | - |
442 | 183.52 | 0.76 | 7.225 | 0.030 | 7.1/4 | 7.3/4 |
442A | 187.30 | 0.76 | 7.375 | 0.030 | 7.3/8 | 7.7/8 |
443 | 189.87 | 0.76 | 7.475 | 0.030 | 7.1/2 | 8 |
443A | 193.70 | 0.76 | 7.625 | 0.030 | 7.5/8 | 8.1/8 |
444 | 196.22 | 0.76 | 7.725 | 0.030 | 7.3/4 | 8.1/4 |
444A | 199.80 | 0.76 | 7.875 | 0.030 | 7.7/8 | 8.3/8 |
445 | 202.57 | 0.76 | 7.975 | 0.030 | 8 | 8.1/2 |
445A | 208.92 | 0.76 | 8.225 | 0.030 | 8.1/4 | 8.3/4 |
446 | 215.27 | 0.76 | 8.475 | 0.030 | 8.1/2 | 9 |
446A | 221.62 | 0.76 | 8.725 | 0.030 | 8.3/4 | 9.1/4 |
1/4" cross section | ||||||
---|---|---|---|---|---|---|
6.99mm ± 0.15mm 0.275"± 0.006" | ||||||
Internal diameter | Nominal size | |||||
Part No. (BS) | mm | Tol ± | Inch | Tol ± | Shaft | Bore |
447 | 227.97 | 0.76 | 8.975 | 0.030 | 9 | 9.1/2 |
447A | 234.32 | 0.76 | 9.225 | 0.030 | 9.1/4 | 9.3/4 |
448 | 240.67 | 0.76 | 9.475 | 0.030 | 9.1/2 | 10 |
448A | 247.00 | 0.76 | 9.725 | 0.030 | 9.3/4 | 10.1/4 |
449 | 253.57 | 0.76 | 9.975 | 0.030 | 10 | 10.1/2 |
449A | 259.70 | 0.76 | 10.225 | 0.030 | 10.1/4 | 10.3/4 |
450 | 266.07 | 0.76 | 10.475 | 0.030 | 10.1/2 | 11 |
450A | 272.40 | 0.76 | 10.725 | 0.030 | 10.3/4 | 11.1/4 |
451 | 278.77 | 0.76 | 10.975 | 0.030 | 11 | 11.1/2 |
451A | 285.10 | 0.76 | 11.225 | 0.030 | 11.1/4 | 11.3/4 |
452 | 291.47 | 0.76 | 11.475 | 0.030 | 11.1/2 | 12 |
452A | 297.80 | 0.76 | 11.725 | 0.030 | 11.3/4 | 12.1/4 |
453 | 304.17 | 0.76 | 11.975 | 0.030 | 12 | 12.1/2 |
453A | 310.50 | 0.76 | 12.225 | 0.030 | 12.1/4 | 12.3/4 |
454 | 316.87 | 0.76 | 12.475 | 0.030 | 12.1/2 | 13 |
455 | 329.57 | 0.76 | 12.975 | 0.030 | 13 | 13.1/2 |
456 | 342.27 | 0.76 | 13.475 | 0.030 | 13.1/2 | 14 |
457 | 354.97 | 0.76 | 13.975 | 0.030 | 14 | 14.1/2 |
458 | 367.67 | 0.76 | 14.475 | 0.030 | 14.1/2 | 15 |
459 | 380.37 | 0.76 | 14.975 | 0.030 | 15 | 15.1/2 |
460 | 393.07 | 0.76 | 15.475 | 0.030 | 15.1/2 | 16 |
461 | 405.26 | 1.14 | 15.955 | 0.045 | 1 | 16.1/2 |
462 | 417.96 | 1.14 | 16.455 | 0.045 | 16.1/2 | 17 |
463 | 430.66 | 1.14 | 16.955 | 0.045 | 17 | 17.1/2 |
464 | 430.66 | 1.14 | 17.455 | 0.045 | 17.1/2 | 18 |
465 | 456.06 | 1.14 | 17.955 | 0.045 | 1 | 18.1/2 |
466 | 468.76 | 1.14 | 18.455 | 0.045 | 18.1/2 | 19 |
467 | 481.46 | 1.14 | 18.955 | 0.045 | 19 | 19.1/2 |
468 | 494.16 | 1.14 | 19.455 | 0.045 | 19.1/2 | 20 |
469 | 506.86 | 1.14 | 19.955 | 0.045 | 20 | 20.1/2 |
470 | 532.26 | 1.14 | 20.995 | 0.045 | 21 | 21.1/2 |
471 | 557.66 | 1.14 | 21.955 | 0.045 | 22 | 22.1/2 |
472 | 582.68 | 1.52 | 22.840 | 0.060 | 23 | 23.1/2 |
473 | 608.08 | 1.52 | 23.940 | 0.060 | 24 | 24.1/2 |
474 | 633.48 | 1.52 | 24.940 | 0.060 | 25 | 25.1/2 |
475 | 658.88 | 1.52 | 25.940 | 0.060 | 26 | 26.1/2 |