The JBO Thread Plug Gauge is a precision tool built for metric fine threads. Specifically calibrated for M2 x 0.25 right-hand threads in 5H tolerance, it’s ideal for engineers, machinists, quality teams, and DIY enthusiasts who must verify threaded holes quickly and accurately.

Its Go/No-Go design lets you confirm a hole’s fit in seconds, while its hardened steel construction stands up to daily use in the workshop. The knurled, easy-grip body provides confident handling during inspections.

• Go/No-Go quick verification: Quickly confirm whether a threaded hole meets the M2 x 0.25 right-hand specification, reducing guesswork and speeding up quality checks.
• Durable hardened steel construction: Built to resist wear and maintain accuracy over many inspections, delivering long service life in busy workshops.
• Ergonomic, knurled design for control: Easy to grip and position, enabling precise alignment and repeatable results with minimal handling effort.

This plug gauge helps you streamline QC, cut downtime, and ensure consistent threading outcomes across assemblies. Use it to validate hole sizes before assembly, shorten setup times, and preserve component fit with reliable, repeatable checks.