The JBO Thread Plug Gauge (GO) is a precision tool designed to quickly verify metric threaded holes. Built for right‑hand M50 x 2 threads with 4H tolerance, it helps machinists, inspectors, and quality teams confirm holes meet exact size and pitch requirements with minimal fuss.

• Hardened steel construction: Delivers long-lasting durability and wear resistance in busy workshop environments, ensuring repeatable GO checks over many cycles.
• Metric Fine M50 x 2 sizing: Precisely matched to the M50 x 2 metric fine thread standard, providing reliable hole verification that supports accurate assembly and quality control.
• Ergonomic knurled handle: Easy to grip and align, enabling fast, confident insertions even with gloves and reduced user fatigue during inspections.

Together, these features help you speed up quality checks, reduce rework, and maintain consistent thread integrity across parts and assemblies—giving your team dependable results you can trust in demanding production environments.