The JBO Thread Plug Gauge is a metric fine-thread Go/No-Go tool designed to quickly verify threaded holes. Perfect for machinists, quality inspectors, and assembly teams, it ensures M4.5 x 0.5 threads meet exact tolerances for reliable fits.

Built for everyday workshop use, this Right Hand, 6G gauge features hardened steel construction for long life and consistent performance even in high-use environments.

• Go/No-Go design for fast checks: Quickly determine whether a hole is within tolerance by confirming the plug either goes in (Go) or fails to fit (No-Go), speeding setup and quality checks without full thread measurement.
• Metric fine-thread compatibility (M4.5 x 0.5, 6G, Right Hand): Specifically calibrated for metric fine threads, ensuring accurate assessment of hole size and thread engagement for your M4.5 x 0.5 applications.
• Hardened steel construction for durability: Built to withstand daily use in demanding environments, resisting wear to maintain accuracy and extend tool life.

The JBO Thread Plug Gauge helps you streamline inspections, keep production moving, and ensure consistent threads every time. Its compact, hand-held design makes it easy to carry in a toolbox or on a job site, while its durable construction stands up to daily use, giving you dependable results from the first part to the last. Use it to speed up setup, reduce scrap, and improve overall fit and function in assemblies that rely on precise M4.5 x 0.5 threads.