The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine-thread holes. Sized for M38 x 1.5 with a 6G tolerance and right-hand thread orientation, this Go/No-Go gauge is ideal for machinists, quality inspectors, and assembly technicians who need fast, reliable verification of threaded holes.

Built to endure daily use, the gauge features hardened steel construction that resists wear and maintains accurate measurements after repeated insertions. Its knurled, compact body provides a secure grip in busy work environments, making it easy to integrate into standard inspection routines.

• Go/No-Go design for fast hole validation: Quickly determine whether a threaded hole meets the M38 x 1.5 with 6G tolerance, delivering clear pass/fail results to speed up inspections and reduce guesswork.
• Hardened steel construction for lasting accuracy: Built to withstand heavy use in busy shops, resisting wear to preserve tight tolerances and extend tool life.
• Right-hand orientation for standard metric applications: Aligns with common metric threading setups, ensuring straightforward setup and reliable results in typical production and maintenance environments.

Using the JBO Thread Plug Gauge streamlines quality control by providing immediate, actionable feedback on thread fit. The durable build minimizes downtime and replacement needs, helping you maintain consistent results across parts and assemblies that rely on precise M38 x 1.5 fine threads.