Go/No-Go Threaded Plug Gauges with Handle
Speed up thread tolerance checks—the handle on these gauges gives you a good grip to quickly thread and unthread go or no-go gauges. Use these gauges to make sure nuts, tapped holes, and other parts fall within tolerance. All are precisely manufactured to confirm thread fit. If the plug gauges wear down, you can insert new ones (not included) onto the taperlock handle.
A part is within tolerance if it’s easy to thread the go gauge into the part but difficult to thread the no-go gauge more than two turns.
Go gauges check the minimum internal thread size. No-go gauges check the maximum internal thread size. Go/no-go gauges have both a go gauge on one end of the handle and a no-go gauge on the other to speed up tests.
Gauges with a calibration certificate traceable to NIST were calibrated in a lab. The certificate, sometimes called a test report or long-form certificate, details the tested measurements.
Thread fit designates the tightness or looseness of mating threads. For inch threads, the higher the class number, the tighter the fit. 2B is standard for most imperial threads. These metric-threaded gauges are class 6H, which is comparable to the fit of those with class 2B.
For technical drawings and 3-D models, click on a part number.
| Thread Size  | Thread Type | Pitch Dia. Tolerance | Hardness | Material | Features | Choose a For Thread Fit | Each | |
Go/No-Go Gauges | ||||||||
|---|---|---|---|---|---|---|---|---|
| 0-80 | UNF | -0.0002" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | Double-Ended Taperlock Handle | 00000000 | 0000000 | |
Go/No-Go Gauges with Calibration Certificate Traceable to NIST | ||||||||
| 0-80 | UNF | -0.0002" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | Double-Ended Taperlock Handle | 0000000 | 000000 | |
Threaded Plug Gauges
Test if internal threads fall within tolerance. These plug gauges are often used in nuts and tapped holes to confirm thread fit. For precision and accuracy, they’re manufactured to tight tolerances.
Threads are within tolerance if it’s easy to thread a go gauge but difficult to thread a no-go gauge more than two turns. Combine these gauges with a threaded plug gauge handle for extra grip to speed up inspections.
Go gauges check the minimum internal thread size.
No-go gauges check the maximum internal thread size.
Gauges with a certificate of accuracy traceable to NIST include verification from the manufacturer that their thread sizes are within tolerance. The certificate is also known as a certificate of compliance or a short-form certification.
Thread fit designates the tightness or looseness of mating threads. For inch threads, the higher the class number, the tighter the fit. 2B is standard and works for most applications. For metric threads, the higher the class number, the looser the fit. 6H is the metric standard and works for most applications.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Thread Type | Pitch Dia. Tolerance | Hardness | Material | For Thread Fit | Each | |
Go Gauges | |||||||
|---|---|---|---|---|---|---|---|
| 0-80 | UNF | 0" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | Class 2B, Class 3B | 0000000 | 000000 |
Go Gauges with Certificate of Accuracy Traceable to NIST | |||||||
| 0-80 | UNF | 0" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | Class 2B, Class 3B | 00000000 | 00000 |
No-Go Gauges | |||||||
| 0-80 | UNF | -0.0002" to 0" | Rockwell C70 | Chrome-Plated Tool Steel | Class 2B | 0000000 | 00000 |
| 0-80 | UNF | -0.0002" to 0" | Rockwell C70 | Chrome-Plated Tool Steel | Class 3B | 0000000 | 00000 |
No-Go Gauges with Certificate of Accuracy Traceable to NIST | |||||||
| 0-80 | UNF | -0.0002" to 0" | Rockwell C70 | Chrome-Plated Tool Steel | Class 2B | 00000000 | 00000 |
| 0-80 | UNF | -0.0002" to 0" | Rockwell C70 | Chrome-Plated Tool Steel | Class 3B | 00000000 | 00000 |
Threaded Hole Location Gauges
Find the true center of threaded holes to precisely align and measure parts. Once you thread these gauges into a hole, their cylinder sticks out as a reliable reference point. They’re often used with a coordinate measuring machine (CMM) to pinpoint the coordinates of the cylinder’s exact center. You can then use those coordinates to measure distances between points or reference them for error-free assembly. Even without a CMM, you can use these gauges with a micrometer to measure accurate center-to-center distances.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Thread Type | Hardness | Material | Each | |
| 0-80 | UNF | Rockwell C60 | Tool Steel | 0000000 | 0000000 |