| AS568 No. | Nominal Reference | Actual Dimensions | |||
| I.D. | O.D. | Width | I.D. Tolerance | Width Tolerance | |
| -351 | 4 3/4 | 5 1/8 | 3/16 | 4.725 ± .030 | .210 ± .005 |
| -352 | 4 7/8 | 5 1/4 | 3/16 | 4.850 ± .030 | .210 ± .005 |
| -353 | 5 | 5 3/8 | 3/16 | 4.975 ± .037 | .210 ± .005 |
| -354 | 5 1/8 | 5 1/2 | 3/16 | 5.100 ± .037 | .210 ± .005 |
| -355 | 5 1/4 | 5 5/8 | 3/16 | 5.225 ± .037 | .210 ± .005 |
| -356 | 5 3/8 | 5 3/4 | 3/16 | 5.350 ± .037 | .210 ± .005 |
| -357 | 5 1/2 | 5 7/8 | 3/16 | 5.475 ± .037 | .210 ± .005 |
| -358 | 5 5/8 | 6 | 3/16 | 5.600 ± .037 | .210 ± .005 |
| -359 | 5 3/4 | 6 1/8 | 3/16 | 5.725 ± .037 | .210 ± .005 |
| -360 | 5 7/8 | 6 1/4 | 3/16 | 5.850 ± .037 | .210 ± .005 |
| -361 | 6 | 6 3/8 | 3/16 | 5.975 ± .037 | .210 ± .005 |
| -362 | 6 1/4 | 6 5/8 | 3/16 | 6.225 ± .040 | .210 ± .005 |
| -363 | 6 1/2 | 6 7/8 | 3/16 | 6.475 ± .040 | .210 ± .005 |
| -364 | 6 3/4 | 7 1/8 | 3/16 | 6.725 ± .040 | .210 ± .005 |
| -365 | 7 | 7 3/8 | 3/16 | 6.975 ± .040 | .210 ± .005 |
| -366 | 7 1/4 | 7 5/8 | 3/16 | 7.225 ± .040 | .210 ± .005 |
| -367 | 7 1/2 | 7 7/8 | 3/16 | 7.475 ± .045 | .210 ± .005 |
| -368 | 7 3/4 | 8 1/8 | 3/16 | 7.725 ± .045 | .210 ± .005 |
| -369 | 8 | 8 3/8 | 3/16 | 7.975 ± .045 | .210 ± .005 |
| -370 | 8 1/4 | 8 5/8 | 3/16 | 8.225 ± .050 | .210 ± .005 |
| -371 | 8 1/2 | 8 7/8 | 3/16 | 8.475 ± .050 | .210 ± .005 |
| -372 | 8 3/4 | 9 1/8 | 3/16 | 8.725 ± .050 | .210 ± .005 |
| -373 | 9 | 9 3/8 | 3/16 | 8.975 ± .050 | .210 ± .005 |
| -374 | 9 1/4 | 9 5/8 | 3/16 | 9.225 ± .055 | .210 ± .005 |
| -375 | 9 1/2 | 9 7/8 | 3/16 | 9.475 ± .055 | .210 ± .005 |
| -376 | 9 3/4 | 10 1/8 | 3/16 | 9.725 ± .055 | .210 ± .005 |
| -377 | 10 | 10 3/8 | 3/16 | 9.975 ± .055 | .210 ± .005 |
| -378 | 10 1/2 | 10 7/8 | 3/16 | 10.475 ± .060 | .210 ± .005 |
| -379 | 11 | 11 3/8 | 3/16 | 10.975 ± .060 | .210 ± .005 |
| -380 | 11 1/2 | 11 7/8 | 3/16 | 11.475 ± .065 | .210 ± .005 |
| -381 | 12 | 12 3/8 | 3/16 | 11.975 ± .065 | .210 ± .005 |
| -382 | 13 | 13 3/8 | 3/16 | 12.975 ± .065 | .210 ± .005 |
| -383 | 14 | 14 3/8 | 3/16 | 13.975 ± .070 | .210 ± .005 |
| -384 | 15 | 15 3/8 | 3/16 | 14.975 ± .070 | .210 ± .005 |
| -385 | 16 | 16 3/8 | 3/16 | 15.955 ± .075 | .210 ± .005 |
| -386 | 17 | 17 3/8 | 3/16 | 16.955 ± .080 | .210 ± .005 |
| -387 | 18 | 18 3/8 | 3/16 | 17.955 ± .085 | .210 ± .005 |
| -388 | 19 | 19 3/8 | 3/16 | 18.955 ± .090 | .210 ± .005 |
| -389 | 20 | 20 3/8 | 3/16 | 19.955 ± .095 | .210 ± .005 |
| -390 | 21 | 21 3/8 | 3/16 | 20.955 ± .095 | .210 ± .005 |
| -391 | 22 | 22 3/8 | 3/16 | 21.955 ± .100 | .210 ± .005 |
| -392 | 23 | 23 3/8 | 3/16 | 22.940 ± .105 | .210 ± .005 |
| -393 | 24 | 24 3/8 | 3/16 | 23.940 ± .110 | .210 ± .005 |
| -394 | 25 | 25 3/8 | 3/16 | 24.940 ± .115 | .210 ± .005 |
| -395 | 26 | 26 3/8 | 3/16 | 25.940 ± .120 | .210 ± .005 |