Pre Tap Drill Size
Pipe Tap NPSF
Tap | Drill Size | Decimal Equivalent |
|---|---|---|
2in - 11-1/2 | -- | -- |
1.50 - 11-1/2 | -- | -- |
1.25 - 11-1/2 | -- | -- |
1in 11-1/2 | 1in 5/32 | 1.1562 |
3/4 - 14 | 59/64 | 0.9218 |
1/2 - 14 | 18MM | 0.7086 |
3/8 - 18 | 37/64 | 0.5781 |
1/4 - 18 | 7/16 | 0.4375 |
1/8 - 27 | R | 0.339 |
1/16 - 27 | D | 0.246 |