The JBO Thread Plug Gauge (GO) - Metric Fine is a precision go gauge designed to quickly verify threaded holes in metric sizes. It’s ideal for engineers, machinists, quality inspectors, and workshop teams who need fast, reliable confirmation that internal threads meet specification before assembly or production runs.

Crafted from hardened steel, the JBO Go Gauge delivers lasting performance in demanding work environments. Its metric fine sizing (M55 x 3) and right‑hand orientation are paired with a 6H tolerance standard to support accurate Go checks and consistent inspection results across parts and processes.

• Metric fine Go gauge, M55 x 3 (Right‑Hand): Quickly verify that threaded holes meet the 6H standard, enabling fast pass/fail decisions during setup and in-process checks.
• Hardened steel for durability: Built to resist wear and maintain accuracy through heavy use, reducing replacement costs and downtime.
• Ergonomic, user‑friendly design: Knurled body and straightforward orientation make it easy to identify acceptable holes and complete inspections with minimal effort.

This gauge helps you streamline quality control, improve first‑pass yields, and sustain reliable thread integrity across production with a simple, trustworthy Go/No‑Go check that fits seamlessly into standard inspection routines.