| AS568 No. | Nominal Reference | Actual Dimensions | |||
| I.D. | O.D. | Width | I.D. Tolerance | Width Tolerance | |
| -201 | 3/16 | 7/16 | 1/8 | .171 ± .005 | .139 ± .004 |
| -202 | 1/4 | 1/2 | 1/8 | .234 ± .005 | .139 ± .004 |
| -203 | 5/16 | 9/16 | 1/8 | .296 ± .005 | .139 ± .004 |
| -204 | 3/8 | 5/8 | 1/8 | .359 ± .005 | .139 ± .004 |
| -205 | 7/16 | 11/16 | 1/8 | .421 ± .005 | .139 ± .004 |
| -206 | 1/2 | 3/4 | 1/8 | .484 ± .005 | .139 ± .004 |
| -207 | 9/16 | 13/16 | 1/8 | .546 ± .007 | .139 ± .004 |
| -208 | 5/8 | 7/8 | 1/8 | .609 ± .009 | .139 ± .004 |
| -209 | 11/16 | 15/16 | 1/8 | .671 ± .009 | .139 ± .004 |
| -210 | 3/4 | 1 | 1/8 | .734 ± .010 | .139 ± .004 |
| -211 | 13/16 | 1 1/16 | 1/8 | .796 ± .010 | .139 ± .004 |
| -212 | 7/8 | 1 1/8 | 1/8 | .859 ± .010 | .139 ± .004 |
| -213 | 15/16 | 1 3/16 | 1/8 | .921 ± .010 | .139 ± .004 |
| -214 | 1 | 1 1/4 | 1/8 | .984 ± .010 | .139 ± .004 |
| -215 | 1 1/16 | 1 5/16 | 1/8 | 1.046 ± .010 | .139 ± .004 |
| -216 | 1 1/8 | 1 3/8 | 1/8 | 1.109 ± .012 | .139 ± .004 |
| -217 | 1 3/16 | 1 7/16 | 1/8 | 1.171 ± .012 | .139 ± .004 |
| -218 | 1 1/4 | 1 1/2 | 1/8 | 1.234 ± .012 | .139 ± .004 |
| -219 | 1 5/16 | 1 9/16 | 1/8 | 1.296 ± .012 | .139 ± .004 |
| -220 | 1 3/8 | 1 5/8 | 1/8 | 1.359 ± .012 | .139 ± .004 |
| -221 | 1 7/16 | 1 11/16 | 1/8 | 1.421 ± .012 | .139 ± .004 |
| -222 | 1 1/2 | 1 3/4 | 1/8 | 1.484 ± .015 | .139 ± .004 |
| -223 | 1 5/8 | 1 7/8 | 1/8 | 1.609 ± .015 | .139 ± .004 |
| -224 | 1 3/4 | 2 | 1/8 | 1.734 ± .015 | .139 ± .004 |
| -225 | 1 7/8 | 2 1/8 | 1/8 | 1.859 ± .018 | .139 ± .004 |
| -226 | 2 | 2 1/4 | 1/8 | 1.984 ± .018 | .139 ± .004 |
| -227 | 2 1/8 | 2 3/8 | 1/8 | 2.109 ± .018 | .139 ± .004 |
| -228 | 2 1/4 | 2 1/2 | 1/8 | 2.234 ± .020 | .139 ± .004 |
| -229 | 2 3/8 | 2 5/8 | 1/8 | 2.359 ± .020 | .139 ± .004 |
| -230 | 2 1/2 | 2 3/4 | 1/8 | 2.484 ± .020 | .139 ± .004 |
| -231 | 2 5/8 | 2 7/8 | 1/8 | 2.609 ± .020 | .139 ± .004 |
| -232 | 2 3/4 | 3 | 1/8 | 2.734 ± .024 | .139 ± .004 |
| -233 | 2 7/8 | 3 1/8 | 1/8 | 2.859 ± .024 | .139 ± .004 |
| -234 | 3 | 3 1/4 | 1/8 | 2.984 ± .024 | .139 ± .004 |
| -235 | 3 1/8 | 3 3/8 | 1/8 | 3.109 ± .024 | .139 ± .004 |
| -236 | 3 1/4 | 3 1/2 | 1/8 | 3.234 ± .024 | .139 ± .004 |
| -237 | 3 3/8 | 3 5/8 | 1/8 | 3.359 ± .024 | .139 ± .004 |
| -238 | 3 1/2 | 3 3/4 | 1/8 | 3.484 ± .024 | .139 ± .004 |
| -239 | 3 5/8 | 3 7/8 | 1/8 | 3.609 ± .028 | .139 ± .004 |
| -240 | 3 3/4 | 4 | 1/8 | 3.734 ± .028 | .139 ± .004 |