Threaded Ring Gauges for Pipe Threads
Confirm that external pipe threads are sized within tolerance. Manufactured with precision, these gauges meet tight thread tolerances themselves.
Use gauges with NPT, NPTF, and BSPT threads on their own for tests—if it takes no more than one turn for the gauge to sit flush against the end of the threads, they’re within tolerance.
Gauges—Class X
Pipe Size | Hardness | Material | Pitch Dia. Tolerance | Each | |
NPTF Threads | |||||
|---|---|---|---|---|---|
| 1/16 | Rockwell C55 | Tool Steel | -0.0003" to 0.0003" | 00000000 | 0000000 |
| 1/8 | Rockwell C55 | Tool Steel | -0.0003" to 0.0003" | 00000000 | 000000 |
| 1/4 | Rockwell C55 | Tool Steel | -0.0003" to 0.0003" | 00000000 | 000000 |
| 3/8 | Rockwell C55 | Tool Steel | -0.0003" to 0.0003" | 00000000 | 000000 |
| 1/2 | Rockwell C55 | Tool Steel | -0.0003" to 0.0003" | 00000000 | 000000 |
| 3/4 | Rockwell C55 | Tool Steel | -0.0003" to 0.0003" | 00000000 | 000000 |