| NPT Nominal Size | Actual OD | Hand Tight Turns | Wrench Turns |
| 1/8 | 0.405″ | 4.5 | 2.5 |
| 1/4 | 0.54″ | 4 | 3 |
| 3/8 | 0.675″ | 4.5 | 3 |
| 1/2 | 0.84″ | 4.5 | 3 |
| 3/4 | 1.05″ | 4.5 | 3 |
| 1 | 1.32″ | 4.5 | 3.25 |
| 1 1/4 | 1.66″ | 4.5 | 3.25 |
| BSP Nominal Size | Major Diameter (OD) | Minor Diameter (ID) |
| 1/8 | 0.38″ | 0.34 |
| 1/4 | 0.52″ | 0.45 |
| 3/8 | 0.65″ | 0.59 |
| 1/2 | 0.83″ | 0.73 |
| 3/4 | 1.04″ | 0.95 |
| 1 | 1.30″ | 1.19 |
| 1 1/4 | 1.65″ | 1.53 |
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