Nut and Bolt Gauges

Our Thread Checkers are accurate & easy to use thread identification tools. Featuring a male threaded stud on one end and a female threaded hole on the other, they will quickly identify both Nuts & Bolts in Metric & Inch sizes. Available in both portable and wall mounted versions. Metric sizes range from M3 to M24 and Inch sizes from #6 to 1" in both Coarse & Fine pitches.