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. Made in U.S.A. Specifications
Each size has a nut and bolt checker on the same gauge
Thread sizes are perm
5.0
3 ratings
5
4
3
2
1
Much better than the cheap aluminum alternatives - also has space on the line to allow you to isolate when inserting