BA (British Association) - 11219
THREAD ANGLE 47½*
Taper Tap 4 per side
Second Tap 8 per side
Bottoming Tap 23 per side
* Also Available in HSS
| Threads Per Inch | Size No |
|---|---|
| 25.4 | 0 |
| 28.2 | 1 |
| 31.4 | 2 |
| 34.8 | 3 |
| 38.5 | 4 |
| 43 | 5 |
| 47.9 | 6 |
| 52.9 | 7 |
| 59.1 | 8 |
| 65.1 | 9 |
| 72.6 | 10 |
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