| AS568 No. | Nominal Reference | Actual Dimensions | |||
| I.D. | O.D. | Width | I.D. Tolerance | Width Tolerance | |
| -425 | 4 1/2 | 5 | 1/4 | 4.475 ± .033 | .275 ± .006 |
| -426 | 4 5/8 | 5 1/8 | 1/4 | 4.600 ± .033 | .275 ± .006 |
| -427 | 4 3/4 | 5 1/4 | 1/4 | 4.725 ± .033 | .275 ± .006 |
| -428 | 4 7/8 | 5 3/8 | 1/4 | 4.850 ± .033 | .275 ± .006 |
| -429 | 5 | 5 1/2 | 1/4 | 4.975 ± .037 | .275 ± .006 |
| -430 | 5 1/8 | 5 5/8 | 1/4 | 5.100 ± .037 | .275 ± .006 |
| -431 | 5 1/4 | 5 3/4 | 1/4 | 5.225 ± .037 | .275 ± .006 |
| -432 | 5 3/8 | 5 7/8 | 1/4 | 5.350 ± .037 | .275 ± .006 |
| -433 | 5 1/2 | 6 | 1/4 | 5.475 ± .037 | .275 ± .006 |
| -434 | 5 5/8 | 6 1/8 | 1/4 | 5.600 ± .037 | .275 ± .006 |
| -435 | 5 3/4 | 6 1/4 | 1/4 | 5.725 ± .037 | .275 ± .006 |
| -436 | 5 7/8 | 6 3/8 | 1/4 | 5.850 ± .037 | .275 ± .006 |
| -437 | 6 | 6 1/2 | 1/4 | 5.975 ± .037 | .275 ± .006 |
| -438 | 6 1/4 | 6 3/4 | 1/4 | 6.225 ± .040 | .275 ± .006 |
| -439 | 6 1/2 | 7 | 1/4 | 6.475 ± .040 | .275 ± .006 |
| -440 | 6 3/4 | 7 1/4 | 1/4 | 6.725 ± .040 | .275 ± .006 |
| -441 | 7 | 7 1/2 | 1/4 | 6.975 ± .040 | .275 ± .006 |
| -442 | 7 1/4 | 7 3/4 | 1/4 | 7.225 ± .040 | .275 ± .006 |
| -443 | 7 1/2 | 8 | 1/4 | 7.475 ± .045 | .275 ± .006 |
| -444 | 7 3/4 | 8 1/4 | 1/4 | 7.725 ± .045 | .275 ± .006 |
| -445 | 8 | 8 1/2 | 1/4 | 7.975 ± .045 | .275 ± .006 |
| -446 | 8 1/2 | 9 | 1/4 | 8.475 ± .055 | .275 ± .006 |
| -447 | 9 | 9 1/2 | 1/4 | 8.975 ± .055 | .275 ± .006 |
| -448 | 9 1/2 | 10 | 1/4 | 9.475 ± .055 | .275 ± .006 |
| -449 | 10 | 10 1/2 | 1/4 | 9.975 ± .055 | .275 ± .006 |
| -450 | 10 1/2 | 11 | 1/4 | 10.475 ± .060 | .275 ± .006 |
| -451 | 11 | 11 1/2 | 1/4 | 10.975 ± .060 | .275 ± .006 |
| -452 | 11 1/2 | 12 | 1/4 | 11.475 ± .060 | .275 ± .006 |
| -453 | 12 | 12 1/2 | 1/4 | 11.975 ± .060 | .275 ± .006 |
| -454 | 12 1/2 | 13 | 1/4 | 12.475 ± .060 | .275 ± .006 |
| -455 | 13 | 13 1/2 | 1/4 | 12.975 ± .060 | .275 ± .006 |
| -456 | 13 1/2 | 14 | 1/4 | 13.475 ± .070 | .275 ± .006 |
| -457 | 14 | 14 1/2 | 1/4 | 13.975 ± .070 | .275 ± .006 |
| -458 | 14 1/2 | 15 | 1/4 | 14.475 ± .070 | .275 ± .006 |
| -459 | 15 | 15 1/2 | 1/4 | 14.975 ± .070 | .275 ± .006 |
| -460 | 15 1/2 | 16 | 1/4 | 15.475 ± .070 | .275 ± .006 |
| -461 | 16 | 16 1/2 | 1/4 | 15.955 ± .075 | .275 ± .006 |
| -462 | 16 1/2 | 17 | 1/4 | 16.455 ± .075 | .275 ± .006 |
| -463 | 17 | 17 1/2 | 1/4 | 16.955 ± .080 | .275 ± .006 |
| -464 | 17 1/2 | 18 | 1/4 | 17.455 ± .085 | .275 ± .006 |
| -465 | 18 | 18 1/2 | 1/4 | 17.955 ± .085 | .275 ± .006 |
| -466 | 18 1/2 | 19 | 1/4 | 18.455 ± .085 | .275 ± .006 |
| -467 | 19 | 19 1/2 | 1/4 | 18.955 ± .090 | .275 ± .006 |
| -468 | 19 1/2 | 20 | 1/4 | 19.455 ± .090 | .275 ± .006 |
| -469 | 20 | 20 1/2 | 1/4 | 19.955 ± .090 | .275 ± .006 |
| -470 | 21 | 21 1/2 | 1/4 | 20.955 ± .090 | .275 ± .006 |
| -471 | 22 | 22 1/2 | 1/4 | 21.955 ± .100 | .275 ± .006 |
| -472 | 23 | 23 1/2 | 1/4 | 22.940 ± .105 | .275 ± .006 |
| -473 | 24 | 24 1/2 | 1/4 | 23.940 ± .110 | .275 ± .006 |
| -474 | 25 | 25 1/2 | 1/4 | 24.940 ± .115 | .275 ± .006 |
| -475 | 26 | 26 1/2 | 1/4 | 25.940 ± .120 | .275 ± .006 |