The Thread Detective® is a precise and easy-to-use thread identifier for both nuts and bolts, consisting of gliding gauges conveniently assembled onto a wire lanyard. It is especially well suited for distinguishing between similar Inch and Metric threads. Our unique Thread Identifiers (aka thread checkers) are available in all Metric sizes, all Inch sizes, and a combination of all Metric and Inch sizes. Our The Thread Detective® is a precise and easy-to-use thread identifier for both nuts and bolts, consisting of gliding gauges conveniently assembled onto a wire lanyard. It is especially well suited for distinguishing between similar Inch and Metric threads. Our unique Thread Identifiers (aka thread checkers) are available in all Metric sizes, all Inch sizes, and a combination of all Metric and Inch sizes. Our Thread Detectives® are equipped with a 3-3/8 (85 mm) ruler for measuring stud lengths. The ruler can be printed with your company or customer's information for promotional use. For your convenience we provide extra long wire rope for those hard to reach places, as well as loops on each end for convenient hanging.

Miniature Thread Identifiers contain nut and bolt sizes in inch sizes of 1-64, 1-72, 2-56, 2-64, 3-48, 3-56, 4-40, 4-48, and 5-40 as well as metric sizes M1.2x0.25, M1.6x0.35, M1.6x0.20, M1.8x0.35, M2x0.40, M2x0.25, M2.5x0.45, M2.5x0.35, M3x0.35, M3x0.50, M3.5x0.60, M3.5x0.35.

For quantities less than 5 units, please visit our distributors’ websites (P/N 74011073), Grainger P/N 52CC97) by clicking links below.