🔥Nut and bolt thread inspection set for inspecting solid bolts or threaded holes

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, lasting readings that will not wear out with repeated use. Eliminate the guesswork when adjusting 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 there are external thread gauges for nuts and threaded holes, on the opposite side there are internal thread gauges for checking screws. This two-in-one design saves time and toolbox space compared to separate thread checking devices. 

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

ROBUST CONSTRUCTION - Made of hardened stainless steel for lifelong durability. The corrosion-resistant material withstands workshop environments, oil and grease while maintaining measurement accuracy. Unlike plastic gauges, it will not break or deform under the pressure of thread engagement testing; 

ERGONOMIC DESIGN - Compact size with etched size markings for comfortable one-handed operation. The slim profile fits in pockets or tool belts, while 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 (punched), 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 threads before testing to obtain 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.