| AS568 No. | Nominal Reference | Actual Dimensions | |
| Tube Size O.D. | I.D. Tolerance | Width Tolerance | |
| -901 | 3/32 | .185 ± .005 | .056 ± .003 |
| -902 | 1/8 | .239 ± .005 | .064 ± .003 |
| -903 | 3/16 | .301 ± .005 | .064 ± .003 |
| -904 | 1/4 | .351 ± .005 | .072 ± .003 |
| -905 | 5/16 | .414 ± .005 | .072 ± .003 |
| -906 | 3/8 | .468 ± .005 | .078 ± .003 |
| -907 | 7/16 | .530 ± .005 | .082 ± .003 |
| -908 | 1/2 | .644 ± .009 | .097 ± .003 |
| -909 | 9/16 | .706 ± .009 | .097 ± .003 |
| -910 | 5/8 | .755 ± .009 | .097 ± .003 |
| -911 | 11/16 | .863 ± .009 | .116 ± .004 |
| -912 | 3/4 | .924 ± .009 | .116 ± .004 |
| -913 | 13/16 | .986 ± .010 | .116 ± .004 |
| -914 | 7/8 | 1.047 ± .010 | .116 ± .004 |
| -916 | 1 | 1.171 ± .010 | .116 ± .004 |
| -918 | 1 1/8 | 1.355 ± .012 | .116 ± .004 |
| -920 | 1 1/4 | 1.475 ± .014 | .118 ± .004 |
| -924 | 1 1/2 | 1.720 ± .014 | .118 ± .004 |
| -928 | 1 3/4 | 2.090 ± .018 | .118 ± .004 |
| -932 | 2 | 2.337 ± .018 | .118 ± .004 |