| NOMINAL SIZE |
TAP DRILL TAPER NPT |
TAP DRILL STRAIGHT NPS |
|---|---|---|
| 1/16-27 | D | 1/4 |
| 1/8-27 | R | S |
| 1/4-18 | 7/16 | 29/64 |
| 3/8-18 | 37/64 | 19/32 |
| 1/2-14 | 23/32 | 47/64 |
| 3/4-14 | 59/64 | 15/15 |
| 1-11-1/2 | 1-5/32 | 1-3/16 |
| 1-1/4-11-1/2 | 1-1/2 | 1-33/64 |
| 1-1/2-11-1/2 | 1-47/64 | 1-3/4 |
| 2-11-1/2 | 2-7/32 | 2-7/32 |
