The JBO Thread Plug Gauge is a metric fine thread Go/No-Go gauge designed to verify threaded holes quickly and accurately. Built for engineers, machinists, quality inspectors, buyers, tradespeople, and even devoted hobbyists, it helps ensure that M38 x 2 threads in your assemblies will mate reliably and consistently. This right-hand (RH) gauge with a 6G tolerance is tailored for precision-critical work where confidence matters.

The gauge features a rugged hardened steel core and a knurled, easy-grip body for precise handling in busy workshops. Its two ends provide clear Go and No-Go indications, enabling fast checks that mirror real-world mating conditions and prevent costly misfits.

• Go/No-Go quick verification: Enables rapid checks of M38 x 2 threads to confirm whether a hole will accept the mating part, reducing guesswork and rework on assemblies.
• Durable hardened steel construction: Withstands regular use in busy shops, resisting wear to preserve calibration and extend service life.
• Right-hand 6G metric fine thread compatibility: Precisely matches the RH 6G tolerance for M38 x 2, delivering reliable, repeatable inspection results across components.

This plug gauge helps you streamline quality control, speed up assembly, and achieve consistent threading results. By providing clear go/no-go feedback, it minimizes downtime and ensures components fit together right the first time.