Thread Checker 36 Nut and Bolt Thread Gauge - Accurate Size ID

In this review the Thread Checker 36 nut and bolt thread gauge is assessed as a practical, no-nonsense tool for mechanics and DIYers who need a quick, accurate way to identify nut and bolt threads. The single biggest reason to buy is its combination of a wide 36-size range and durable construction, which lets users compare both metric and imperial threads without fumbling through coils or guesswork. The reviewer found it particularly useful where fast, repeatable identification is needed at a workbench or in a toolbox.

Key Features

• 36 Size Coverage: Provides clear identification for 36 distinct nut and bolt sizes so users can match both common metric and imperial threads quickly.
• Metric and Imperial Scales: One side lists metric threads from M3 x 0.5 to M16 x 2.0 and the other lists imperial threads from 6-32 coarse to 5/8-18 fine to cover typical shop needs.
• Durable Construction: Machined from 6061 aluminum alloy with SUS304 threaded pins and a hard anodized surface for longevity in a busy workshop.
• Laser-Etched Ruler: Inch and centimeter scales are laser-etched on both edges for precise measurement and easy visual comparison.
• Mounting Convenience: Three pre-drilled mounting holes allow the gauge to be hung on a wall or fastened to a toolbox for immediate access.
• Clear Markings: The etched markings are easy to read, reducing time spent checking sizes and lowering the chance of repeat trips to a hardware supplier.

Who It's For

This gauge is best for professional mechanics, fabrication shops, and serious DIYers who regularly encounter both metric and imperial fasteners and need a compact, reliable way to identify thread sizes. It suits users who want a durable, non-flexible plate that will not tangle like coil-type identifiers.

It is less suited to someone who needs digital readouts, microscopic pitch measurement for fine-engineering tasks, or a catalog of uncommon specialty threads beyond standard metric and imperial ranges; for those needs a precision pitch gauge or digital thread micrometer would be more appropriate.

Pros & Cons

Pros

• Wide coverage of 36 common metric and imperial sizes makes identification fast and reliable.
• Sturdy 6061 aluminum body and SUS304 threaded pins mean it tolerates workshop conditions.
• Laser-etched inch and centimeter rulers add useful measuring capability on the same tool.
• Pre-drilled holes make storage and accessibility straightforward.

Cons

• Not a replacement for precision measurement tools when micron-level accuracy is required.
• Plate is thick and solid, which is durable but less pocketable than a thin or coil-style gauge.

Specifications

Brand	FODACEL
Sizes	36 nut and bolt sizes (metric and imperial)
Metric Range	M3 x 0.5 to M16 x 2.0
Imperial Range	6-32 coarse to 5/8-18 fine
Body Material	6061 aluminum alloy
Bolt/Pin Material	SUS304 stainless steel
Weight	3.86 lbs

Our Verdict

The Thread Checker 36 nut and bolt thread gauge is a solid, practical tool for anyone who routinely matches fasteners and needs clear, repeatable identification. Its robust materials and dual-scale markings deliver good value for tradespeople and hobbyists who want a durable, easy-to-access gauge on the bench or in a toolbox.

Frequently Asked Questions

Does this gauge include both metric and imperial sizes?
Yes, one side lists metric sizes from M3 x 0.5 to M16 x 2.0 and the other lists imperial sizes from 6-32 to 5/8-18.

Can it be mounted in a workshop?
Yes, the plate includes three pre-drilled mounting holes for wall or toolbox attachment.

Is the gauge corrosion resistant?
The threaded pins are SUS304 stainless steel and the aluminum body has a hard anodized surface to resist rust and wear.