| B.A. No.1 | American No. size | Diameter of hole A | Outside diameter B | Thickness2 C | |||
|---|---|---|---|---|---|---|---|
| max. | min. | max. | min. | ||||
| inch. | S.W.G. | inch. | |||||
| 8 | 2 | 0.099 | 0.094 | 0.185 | 0.180 | 25 | 0.020 |
| 7 | 3 | 0.111 | 0.106 | 0.208 | 0.203 | 24 | 0.022 |
| 6 | 4 | 0.123 | 0.118 | 0.233 | 0.228 | 23 | 0.024 |
| 5 | 5 | 0.140 | 0.135 | 0.268 | 0.263 | 23 | 0.024 |
| 4 | 6 | 0.157 | 0.152 | 0.301 | 0.296 | 22 | 0.028 |
| 3 | 8 | 0.177 | 0.172 | 0.341 | 0.336 | 22 | 0.028 |
| 2 | 10 | 0.202 | 0.197 | 0.391 | 0.386 | 21 | 0.032 |
| 1 | 12 | 0.228 | 0.223 | 0.443 | 0.438 | 20 | 0.036 |
| 0 | – | 0.256 | 0.251 | 0.500 | 0.495 | 19 | 0.040 |