Threaded Ring Gauges
Check a part’s external threads to ensure they fall within tolerance.
The part is within tolerance if it’s easy to thread a go gauge onto the part but difficult to thread a no-go gauge more than two turns.
Go gauges check the maximum external thread size.
Threads have different classes of fit. Thread fit designates the tightness or looseness of the mating threads. For example, inch threads with a 3A fit have tighter tolerances than threads with a 2A fit.
For technical drawings and 3-D models, click on a part number.
Go Gauge | |||||||
---|---|---|---|---|---|---|---|
Thread Size | Thread Type | Hardness | Material | For Thread Fit | Pitch Dia. Tolerance | Each | |
Class X | |||||||
1"-14 | UNS | Rockwell C60 | Tool Steel | Class 3A | -0.0003" to 0" | 00000000 | 0000000 |
Threaded Ring Gauges with Calibration Certificate
A certificate of calibration traceable to NIST states that these gauges have passed a test for accuracy. They’re for checking a part’s external threads to ensure they fall within tolerance.
A part is within tolerance if it’s easy to thread a go gauge onto the part but difficult to thread a no-go gauge more than two turns.
Go gauges check the maximum external thread size.
Threads have different classes of fit. Thread fit designates the tightness or looseness of the mating threads. For example, inch threads with a 3A fit have tighter tolerances than threads with a 2A fit.
For technical drawings and 3-D models, click on a part number.
Go Gauge | |||||
---|---|---|---|---|---|
Class 3A | |||||
Thread Size | Thread Type | Hardness | Material | Each | |
Class X | |||||
1"-14 | UNS | Rockwell C60 | Tool Steel | 00000000 | 0000000 |