Sealey Imperial Nut and Bolt Thread Checker Gauge

The Sealey Imperial Nut and Bolt Thread Checker Gauge (Model AK29) is a precision thread identification tool designed to help tradespeople quickly and accurately match fastener threads without guesswork.

Covering 22 Imperial sizes across both fine and coarse thread standards, this gauge accommodates a comprehensive range of common nuts, bolts, and screws. Each size is clearly labelled with both male and female versions, making thread identification straightforward even in fast-paced workshop or site conditions.

Constructed from durable alloy, the AK29 is built to withstand regular use in demanding trade environments. Its compact, lightweight design means it can be kept in a toolbox or pocket and brought to hand whenever a thread size needs confirming — ideal for mechanics, engineers, and maintenance technicians working with Imperial-threaded components on older machinery, American-specification equipment, or classic vehicles.

Features and Benefits:
• Covers 22 Imperial sizes — both fine and coarse thread standards in a single tool
• Male and female versions of each size clearly labelled for fast, accurate identification
• Durable alloy construction for long-term reliability in trade use
• Compact and lightweight — easy to store in a toolbox or carry on site
• Helps avoid costly fastener mismatches and incorrect thread selection

Specifications:
Model No: AK29
Brand: Sealey
Nett Weight: 0.115kg
Imperial Sizes (Fine): 10-32, 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-20, 9/16"-18, 5/8"-18, 3/4"-16, 1"-12
Imperial Sizes (Coarse): 6-32, 8-32, 10-24, 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12, 5/8"-11, 3/4"-10, 1"-8