Sealey Nut and Bolt Thread Checker Gauge

The Sealey Nut and Bolt Thread Checker Gauge is a precision measuring tool for identifying thread types and sizes on nuts, bolts and screws. Model AK28 has 28 individual thread checkers: 14 Imperial UNF/UNC sizes, from 6-32C to 1/2-20F, and 14 Metric sizes from M4 to M14.

The Metric checkers cover M4-0.7, M5-0.8, M6-1.0, M7-1.0, M8-1.0, M8-1.25, M10-1.0, M10-1.25, M10-1.5, M12-1.25, M12-1.5, M12-1.75, M14-1.5 and M14-2.0. Clear markings distinguish male and female threads and are designed to be easy to read, including in poor lighting.

Made from alloy, the gauge has integrated length checkers on both edges of the board: one side shows metric measurements and the other imperial. Its compact, lightweight design is intended for carrying or toolbox storage. Net weight is 0.86 kg.