Nut & Bolt Thread Checker Kit for Inspection of Fixed Bolts or Threaded Holes

FEATURES

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

DUAL-SIDED FUNCTIONALITY - Check both internal and external threads with one compact tool. One side features male thread gauges for nuts and threaded holes, while the opposite side contains female gauges for bolt inspection. This two-in-one design saves time and toolbox space compared to separate thread checkers.  

COMPREHENSIVE THREAD RANGE - Covers all common metric and imperial thread standards in a single device. From fine to coarse pitches, the gauge includes frequently used sizes for automotive, industrial, and household applications. Never struggle with mismatched fasteners again, thanks to complete coverage in one durable tool.  

RUGGED CONSTRUCTION - Machined from hardened stainless steel for lifetime durability. The corrosion-resistant material withstands shop environments, oil, and grease while maintaining measurement precision. Unlike plastic gauges, it won't crack or deform under pressure during thread engagement tests.  

ERGONOMIC DESIGN - Compact size with etched size labels for comfortable one-handed operation. The slim profile fits in pockets or tool belts, while the clearly marked sizes allow for quick visual confirmation. Knurled edges provide 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 threads before testing for accurate measurements.  

Do not force gauge - improper fit indicates wrong thread type.  

Not suitable for measuring thread wear or damage.  

Store in dry environment to prevent corrosion.