The Sealey Nut and Bolt Thread Checker Gauge is a precision measuring tool designed to accurately identify thread types and sizes on nuts, bolts, and screws. This essential workshop gauge eliminates guesswork when matching fasteners, ensuring you select the correct replacement component every time. Featuring 28 individual thread checkers, this comprehensive gauge covers 14 Imperial sizes (6-32C to 1/2-20F in UNF/UNC) and 14 Metric sizes (M4 to M14) in both coarse and fine pitches.
The easy-to-read markings clearly distinguish between male and female thread versions, making identification quick and straightforward even in poor lighting conditions. Constructed from premium alloy, the gauge delivers long-lasting performance in demanding trade environments. The compact, lightweight design allows it to be easily carried to site or stored in a toolbox without adding significant bulk.
Integrated length checkers on either edge of the board provide additional functionality, with one side showing metric measurements and the other imperial, eliminating the need for a separate ruler. This thread checker is ideal for automotive mechanics, maintenance engineers, and general tradespeople who regularly work with fasteners across different measurement standards. Whether you're repairing machinery, assembling equipment, or sorting mixed fixings, this tool ensures accurate thread identification across the most commonly encountered nut and bolt sizes.
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