The JBO Thread Plug Gauge is a precision inspection tool designed for metric coarse threads, specifically M2 x 0.4. Its compact, right‑hand gauge is ideal for engineers, machinists, quality control inspectors, and assembly technicians who need fast, reliable checks to verify threaded holes and ensure proper fitment in small components. The knurled grip and robust construction make it comfortable to use in busy work environments, promoting consistent results with every test.

• Go/No-Go design for quick checks: instantly determine if a threaded hole meets the required M2 x 0.4 coarse thread specification, speeding up quality control and reducing guesswork.
• Durable hardened steel construction: built to withstand daily workshop use, resisting wear and maintaining accuracy over long service life.
• Right-hand orientation with 6H tolerance: precisely matched to standard 6H coarse-thread gauges, delivering reliable, repeatable results for consistent part mating.

When you choose this gauge, you gain a dependable tool that integrates smoothly into inspection routines, helps prevent misfits before assembly, and supports efficient workflows across production and maintenance tasks. Its durable build and standardized tolerances give you confidence, batch after batch, that threaded holes will accept components as designed.