Sealey Metric Nut and Bolt Thread Checker Gauge

The Sealey Metric Nut and Bolt Thread Checker Gauge (AK29M) is a precision thread identification tool designed to help tradespeople and engineers quickly determine the correct metric thread size for nuts, bolts, and screws.

Covering 22 common metric sizes ranging from M3 to M24, this thread checker gauge offers a practical solution for avoiding fastener mismatches on the job. Whether you're working in automotive, engineering, or general mechanical maintenance, selecting the wrong thread type can cause costly delays — this tool eliminates that guesswork.

Both male and female versions of each size are clearly labelled on the gauge, making it straightforward to identify internal and external threads alike. The alloy construction ensures durability for long-term workshop or site use, while its compact, lightweight form means it can be kept in a tool bag or stored in a drawer without taking up valuable space.

Features and Benefits:
• Covers 22 metric thread sizes from M3 to M24 for broad fastener compatibility
• Male and female thread profiles clearly labelled for accurate identification
• Durable alloy construction for reliable, long-term use
• Compact and lightweight — ideal for toolbox, site bag, or workshop storage
• Helps prevent costly fastener mismatches and thread damage

Specifications:
Model No: AK29M
Brand: Sealey
Nett Weight: 0.115kg
Metric Sizes: M3-0.5, M4-0.7, M5-0.8, M6-1, M7-1, M8-1, M8-1.25, M10-1, M10-1.25, M10-1.5, M12-1, M12-1.25, M12-1.5, M12-1.75, M14-1.5, M14-2, M16-1.5, M16-2, M20-1.5, M20-2.5, M24-2, M24-3