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ASTM Thickness Tolerance for sheet metal |
|   |
| Gage # | Steel | Tubing | Aluminum | Stainless |
| 6/0 | ---- | ---- | 0.58 | 0.4687 |
| 5/0 | ---- | 0.5 | 0.5165 | 0.4375 |
| 4/0 | ---- | 0.454 | 0.46 | 0.4062 |
| 3/0 | ---- | 0.425 | 0.4096 | 0.375 |
| 2/0 | ---- | 0.38 | 0.3648 | 0.3437 |
| 0 | ---- | 0.34 | 0.3249 | 0.3125 |
| 1 | ---- | 0.3 | 0.2893 | 0.2812 |
| 2 | ---- | 0.284 | 0.2576 | 0.2656 |
| 3 | 0.2391 | 0.259 | 0.2294 | 0.25 |
| 4 | 0.2242 | 0.238 | 0.2043 | 0.2344 |
| 5 | 0.2092 | 0.22 | 0.1819 | 0.2187 |
| 6 | 0.1943 | 0.203 | 0.162 | 0.2031 |
| 7 | 0.1793 | 0.18 | 0.1443 | 0.1875 |
| 8 | 0.1644 | 0.165 | 0.1285 | 0.1719 |
| 9 | 0.1495 | 0.148 | 0.1144 | 0.1562 |
| 10 | 0.1345 | 0.134 | 0.1019 | 0.1406 |
| 11 | 0.1196 | 0.12 | 0.0907 | 0.125 |
| 12 | 0.1046 | 0.109 | 0.0808 | 0.1094 |
| 13 | 0.0897 | 0.095 | 0.072 | 0.0937 |
| 14 | 0.0747 | 0.083 | 0.0641 | 0.0781 |
| 15 | 0.0673 | 0.072 | 0.0571 | 0.0703 |
| 16 | 0.0598 | 0.065 | 0.0508 | 0.0625 |
| 17 | 0.0538 | 0.058 | 0.0453 | 0.0562 |
| 18 | 0.0478 | 0.049 | 0.0403 | 0.05 |
| 19 | 0.0418 | 0.042 | 0.0359 | 0.0437 |
| 20 | 0.0359 | 0.035 | 0.032 | 0.0375 |
| 21 | 0.0329 | 0.032 | 0.0285 | 0.0344 |
| 22 | 0.0299 | 0.028 | 0.0253 | 0.0312 |
| 23 | 0.0269 | 0.025 | 0.0226 | 0.0281 |
| 24 | 0.0239 | 0.022 | 0.0201 | 0.025 |
| 25 | 0.0209 | 0.02 | 0.0179 | 0.0219 |
| 26 | 0.0179 | 0.018 | 0.0159 | 0.0187 |
| 27 | 0.0164 | 0.016 | 0.0142 | 0.0172 |
| 28 | 0.0149 | 0.014 | 0.0126 | 0.0156 |
| 29 | 0.0135 | 0.013 | 0.0113 | 0.0141 |
| 30 | 0.012 | 0.012 | 0.01 | 0.0125 |
| 31 | 0.0105 | 0.01 | 0.0089 | 0.0109 |
| 32 | 0.0097 | 0.009 | 0.008 | 0.0102 |
| 33 | 0.009 | 0.008 | 0.0071 | 0.0094 |
| 34 | 0.0082 | 0.007 | 0.0063 | 0.0086 |
| 35 | 0.0075 | 0.005 | 0.0056 | 0.0078 |
| 36 | 0.0067 | 0.004 | 0.005 | 0.007 |
| 37 | 0.0064 | ---- | 0.0045 | 0.0066 |
| 38 | 0.006 | ---- | 0.004 | 0.0062 |
| AWG | inch | mm |
| OOOO | 0.46 | 11.684 |
| OOO | 0.4096 | 10.40384 |
| OO | 0.3648 | 9.26592 |
| 0 | 0.3249 | 8.25246 |
| 1 | 0.2893 | 7.34822 |
| 2 | 0.2576 | 6.54304 |
| 3 | 0.2294 | 5.82676 |
| 4 | 0.2043 | 5.18922 |
| 5 | 0.1819 | 4.62026 |
| 6 | 0.162 | 4.1148 |
| 7 | 0.1443 | 3.66522v |
| 8 | 0.1285 | 3.2639 |
| 9 | 0.1144 | 2.90576 |
| 10 | 0.1019 | 2.58826 |
| 11 | 0.0907 | 2.30378 |
| 12 | 0.0808 | 2.05232 |
| 13 | 0.072 | 1.8288 |
| 14 | 0.0641 | 1.62814 |
| 15 | 0.0571 | 1.45034 |
| 16 | 0.0508 | 1.29032 |
| 17 | 0.0453 | 1.15062 |
| 18 | 0.0403 | 1.02362 |
| 19 | 0.0359 | 0.91186 |
| 20 | 0.032 | 0.8128 |
| 21 | 0.0285 | 0.7239 |
| 22 | 0.0254 | 0.64516 |
| 23 | 0.0226 | 0.57404 |
| 24 | 0.0201 | 0.51054 |
| 25 | 0.0179 | 0.45466 |
| 26 | 0.0159 | 0.40386 |
| 27 | 0.0142 | 0.36068 |
| 28 | 0.0126 | 0.32004 |
| 29 | 0.0113 | 0.28702 |
| 30 | 0.01 | 0.254 |
| 31 | 0.0089 | 0.22606 |
| 32 | 0.008 | 0.2032 |
| Metric 2.0 | 0.00787 | 0.2 |
| 33 | 0.0071 | 0.18034 |
| Metric 1.8 | 0.00709 | 0.18 |
| 34 | 0.0063 | 0.16002 |
| Metric 1.6 | 0.0063 | 0.16002 |
| 35 | 0.0056 | 0.14224 |
| Metric 1.4 | 0.00551 | 0.14 |
| 36 | 0.005 | < td>0.127|
| Metric 1.25 | 0.00492 | 0.125 |
| 37 | 0.0045 | 0.1143 |
| Metric 1.12 | 0.00441 | 0.112 |
| 38 | 0.004 | 0.1016 |
| Metric 1 | 0.00394 | 0.1 |
| 39 | 0.0035 | 0.0889 |
| 40 | 0.0031 | 0.07874 |