Threaded Ring Gauges for Pipe Threads with Calibration Certificate
These gauges come with a certificate that’s traceable to NIST, confirming they were calibrated in a lab. The certificate, sometimes called a test report or a long-form certificate, includes the tested measurements. Use these gauges to verify whether external pipe threads are within tolerance.
Use gauges with BSPP threads in pairs for go/no-go tests. Go gauges check the maximum external thread size, and no-go gauges check the minimum. If the threads you’re testing thread into the go gauge but not the no-go gauge, they’re within tolerance.
For technical drawings and 3-D models, click on a part number.
Pipe Size | Thread Type | Hardness | Material | Pitch Dia. Tolerance | Each | |
Go Gauges | ||||||
|---|---|---|---|---|---|---|
BSPP Threads | ||||||
| 1/8 | BSPP | Rockwell C60 | Tool Steel | -0.0003" to 0" | 0000000 | 0000000 |
| 1/4 | BSPP | Rockwell C60 | Tool Steel | -0.0003" to 0" | 0000000 | 000000 |
| 3/8 | BSPP | Rockwell C60 | Tool Steel | -0.0003" to 0" | 0000000 | 000000 |
| 1/2 | BSPP | Rockwell C60 | Tool Steel | -0.0003" to 0" | 0000000 | 000000 |
| 3/4 | BSPP | Rockwell C60 | Tool Steel | -0.0003" to 0" | 0000000 | 000000 |
| 1 | BSPP | Rockwell C60 | Tool Steel | -0.0003" to 0" | 0000000 | 000000 |
| 1 1/4 | BSPP | Rockwell C60 | Tool Steel | -0.0003" to 0" | 0000000 | 000000 |
No-Go Gauges | ||||||
BSPP Threads | ||||||
| 1/8 | BSPP | Rockwell C60 | Tool Steel | 0" to 0.0003" | 0000000 | 000000 |
| 1/4 | BSPP | Rockwell C60 | Tool Steel | 0" to 0.0003" | 0000000 | 000000 |
| 3/8 | BSPP | Rockwell C60 | Tool Steel | 0" to 0.0003" | 0000000 | 000000 |
| 1/2 | BSPP | Rockwell C60 | Tool Steel | 0" to 0.0003" | 0000000 | 000000 |
| 3/4 | BSPP | Rockwell C60 | Tool Steel | 0" to 0.0003" | 0000000 | 000000 |
| 1 | BSPP | Rockwell C60 | Tool Steel | 0" to 0.0003" | 0000000 | 000000 |
| 1 1/4 | BSPP | Rockwell C60 | Tool Steel | 0" to 0.0003" | 0000000 | 000000 |
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 NPSM and BSPP threads in pairs for go/no-go tests. Go gauges check the maximum external thread size, and no-go gauges check the minimum. If the threads you’re testing thread into the go gauge but not the no-go gauge, they’re within tolerance.
For technical drawings and 3-D models, click on a part number.
Go Gauges | No-Go Gauges | |||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Hardness | Material | Pitch Dia. Tolerance | Each | Pitch Dia. Tolerance | Each | ||
BSPP Threads | ||||||||
| 1/8 | Rockwell C55 | Tool Steel | 0" to 0.0003" | 00000000 | 0000000 | -0.0003" to 0" | 00000000 | 0000000 |
| 1/4 | Rockwell C55 | Tool Steel | 0" to 0.0003" | 00000000 | 000000 | -0.0003" to 0" | 00000000 | 000000 |
| 3/8 | Rockwell C55 | Tool Steel | 0" to 0.0003" | 00000000 | 000000 | -0.0003" to 0" | 00000000 | 000000 |
| 1/2 | Rockwell C55 | Tool Steel | 0" to 0.0003" | 00000000 | 000000 | -0.0003" to 0" | 00000000 | 000000 |
| 3/4 | Rockwell C55 | Tool Steel | 0" to 0.0003" | 00000000 | 000000 | -0.0003" to 0" | 00000000 | 000000 |
| 1 | Rockwell C55 | Tool Steel | 0" to 0.0003" | 00000000 | 000000 | -0.0003" to 0" | 00000000 | 000000 |
| 1 1/4 | Rockwell C55 | Tool Steel | 0" to 0.0003" | 00000000 | 000000 | -0.0003" to 0" | 00000000 | 000000 |