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Quickly identify confusing bolt and nut sizes with our Nut and Bolt Thread Checker, classify them neatly and store them for easy repair and maintenance work! Suitable for craftsman, engineers, and DIY enthusiast or hobbyist.

Your Go-to Tool for Nut & Bolt Identifying! 📏

Quickly identify confusing bolt and nut sizes with our Nut and Bolt Thread Checker, classify them neatly and store them for easy repair and maintenance work! Suitable for craftsman, engineers, and DIY enthusiast or hobbyist.

Simplify your projects by quickly verifying thread pitches, bolt sizes, and more with ease. Compact, durable, and easy to use, this thread checker is a must-have for workshops, garages, and toolboxes.

Precise Measurement

Simplify your projects by quickly verifying thread pitches, bolt sizes, and more with ease. Compact, durable, and easy to use, this thread checker is a must-have for workshops, garages, and toolboxes.

28 Holes: M4 x 0.7 to M14 x 2.0 metric threads and #6 - 32 coarse threads to 1/2 - 20 imperial threads sizes. 44 Holes: M4x0.7 to M14x2.0 in metric thread sizes and 6–32 fine to 1/2–20 fine in standard threads sizes.

28/44 Holes Options

28 Holes: M4 x 0.7 to M14 x 2.0 metric threads and 6 - 32 coarse threads to 1/2 - 20 fine standard threads sizes.

44 Holes: M3 x 0.5 to M24 x 3.0 metric threads and 6-32 coarse to 1-12 fine standard threads sizes.

Made of CNC machined anodized aluminum alloy 6061 and SUS304 stainless steel, meet Go & No Go Class 2B ANSI standards for both internal and external threads. With a protective anodized finish, the laser etched markings will not fade or scratch off.

Aluminum Alloy & Steel Material

Made of CNC machined anodized aluminum alloy 6061 and SUS304 stainless steel, meet Go & No Go Class 2B ANSI standards for both internal and external threads. With a protective anodized finish, the laser etched markings will not fade or scratch off.