Aircraft / Avionics Orders: 800.447.3408 Radio Control Orders: 877.219.4489
| NPT - National Pipe Thread Taper | |||
| Note! Pipe thread sizes do not refer to any physical dimensions. The outside diameter of a pipe or fitting must be measured and referenced to a table for size identification. | |||
| Note! Inserting a NPT tapered fitting into a port tapped for a straight thread fitting and tightening it can break or severely damage the item the fitting is being installed in. | |||
| Pipe Size (inch) |
Thread Pitch TPI |
Fitting O.D. (inch) |
NPT Specifications |
| 1/16" | 27 | 0.313" |
|
| 1/8" | 27 | 0.405" | |
| 1/4" | 18 | 0.540" | |
| 3/8" | 18 | 0.675" | |
| 1/2" | 14 | 0.840" | |