NPT Thread chart
PIPE
FITTING
| PIPE SIZE | INCH | AIR | HYDR. | THREAD O.D (mm) | PIPE I.D (mm) |
|---|---|---|---|---|---|
| 6A | 1/8″ | 01 | 01 | 10.5 | 6 |
| 8A | 1/4″ | 02 | 02 | 13.8 | 8 |
| 10A | 3/8″ | 03 | 04 | 17.3 | 10 |
| 15A | 1/2″ | 04 | 04 | 21.7 | 15 |
| 20A | 3/4″ | 06 | 06 | 27.2 | 20 |
| 25A | 1″ | 10 | 08 | 34 | 25 |
| 32A | 1-1/4″ | 12 | 10 | 42.7 | 32 |
| 40A | 1-1/2″ | 14 | 12 | 48.6 | 40 |
| 50A | 2″ | 20 | 16 | 60.5 | 50 |
| 65A | 2-1/2″ | 20 | 76.3 | 65 | |
| 80A | 3″ | 24 | 89.1 | 80 | |
| 100A | 4″ | 32 | 114.3 | 100 | |
| 125A | 5″ | 40 | 139.8 | 125 |
