Pre Tap Drill Size
Pipe Tap NPSM
Pipe Tap | NPSM | Decimal Equivalent |
|---|---|---|
2in - 11-1/2 | 2in 1/4 | 2.250 |
1in1/2 - 11-1/2 | 1in 25/32 | 1.7812 |
1in1/4 - 11-1/2 | 1in 35/64 | 1.5468 |
1in - 11-1/2 | 1in 13/64 | 1.2031 |
3/4 - 14 | 61/64 | 0.9531 |
1/2 - 14 | 19MM | 0.7480 |
3/8 - 18 | .603 | .603 |
1/4 - 18 | 15/32 | 0.4687 |
1/8 - 27 | T | 0.358 |
1/16 - 27 | -- | -- |