U.S. Patent No. 7877882
The Original Thread Checker is an accurate and easy-to-use thread verifier for both nuts and bolts.
Conveniently assembled onto a wire loop, it is especially well suited for distinguishing between similar inch and metric threads.
- Each size has a nut and bolt checker on the same gauge
- Thread sizes are permanently stamped onto each gauge
- Inch gauges are clear zinc plated, metric gauges are black oxide
- Wire cable with loop for convenient hanging