Nut & Bolt Thread Checker

Thread sizes are permanently stamped onto each gauge (inch in red, metric in white) Inch gauges are clear zinc plated, metric gauges are black oxide. The individual gauges rotate freely on the wire cable for fast thread verification Wire cable with loop for convenient hanging The Inch & Metric Thread Checker is an accurate and easy-to-use thread identifier for both nuts and bolts. Each individual gauge features a male threaded stud on one end and a female threaded hole on the other. The Thread Checker is especially well suited for distinguishing between similar inch and metric threads. Conveniently assembled onto a wire loop, it’s the perfect portable solution!