Mother and bolt thread control set for the inspection of solid bolts or thread elements

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• 🔥98.9% of customers buy 2 or more

FEATURES

PRECISE THREAD MARKING - Quickly determine thread pitch and diameter with military-grade accuracy. The laser-engraved markings on the hardened steel gauges provide clear, permanent readings that won't wear off even with repeated use. Eliminate the guesswork when fitting replacement fasteners or identifying unknown threads in machinery and equipment.

DOUBLE-SIDED FUNCTIONALITY - Check both internal and external threads with one compact tool. On one side are external thread gauges for nuts and threaded holes, and on the opposite side are internal thread gauges for checking bolts. This two-in-one design saves time and space in your toolbox compared to separate thread checking devices.

COMPREHENSIVE THREAD RANGE - Covers all common metric and imperial thread standards in a single tool. From fine to coarse threads, the gauge includes commonly used sizes for automotive, industrial, and household applications. With complete coverage in a single, robust tool, you'll never have to struggle with mismatched fasteners again.

ROBUST CONSTRUCTION - Constructed of hardened stainless steel for lifetime durability. The corrosion-resistant material withstands workshop environments, oil, and grease while maintaining measurement accuracy. Unlike plastic gauges, it won't crack or deform under the pressure of thread engagement tests;

ERGONOMIC DESIGN - Compact size with etched size markings for convenient one-handed operation. The slim profile fits in pockets or tool belts, while the clearly marked sizes allow for quick visual confirmation. Knurled edges ensure a secure grip, even when wearing work gloves.

SPEC

Models: Blue-Red 44-piece set (perforated), Silver-Black 26-piece set, Blue-Red 26-piece set, Blue-Red 44-piece set, Silver-Black 44-piece set

Material: aluminum, steel, plastic

Storage: With storage box

NOTES

Clean the threads before testing to ensure accurate measurements.

Do not force the gauge - an incorrect fit indicates an incorrect thread type

Not suitable for measuring thread wear or damage.

Store in a dry environment to avoid corrosion.