Threaded Ring Gauges for NPT Pipe Threads with Calibration Certificate
To ensure accuracy of external NPT pipe thread measurements, these gauges include a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy.
For technical drawings and 3-D models, click on a part number.
| Pipe Size  | Pitch Diameter Tolerance | Hardness | Material | Each | |
Class X | |||||
|---|---|---|---|---|---|
| 4 | -0.0005" to 0.0005" | Rockwell C60 | Tool Steel | 00000000 | 000000000 |