Tightening of NPT/NPTF thread
| Size |
Thread T
NPT/F |
Assembly
TFFT
Turns |
| 4 |
1/8-27 NPT/F |
2.0-3.0 |
| 6 |
1/4-18 NPT/F |
2.0-3.0 |
| 8 |
3/8-18 NPT/F |
2.0-3.0 |
| 10 |
1/2-14 NPT/F |
2.0-3.0 |
| 12 |
3/4-14 NPT/F |
2.0-3.0 |
| 16 |
1-11 1/2 NPT/F |
1.5-2.5 |
| 20 |
1 1/4-11 1/2 NPT/F |
1.5-2.5 |
| 24 |
1 1/2-11 1/2 NPT/F |
1.5-2.5 |
