The JBO Thread Plug Gauge is a precision Go/No-Go tool designed for metric fine threads, specifically M11 x 1, with right-hand orientation and 4H tolerance. It’s the quick, reliable way for machinists, inspectors, and assembly teams to verify internal threads before mating parts.

Made from hardened steel for long life in busy shop environments, this gauge resists wear and maintains accuracy over time. Its compact, dual-ended design enables fast Go and No-Go checks in a single step, helping you confirm thread fit without guesswork.

• Go/No-Go quick verification: The two-ended design lets you confirm both the minimum (Go) and maximum (No-Go) thread limits for M11 x 1 holes in a single, fast check, reducing guesswork and rejects.
• Hardened steel durability: Built to endure repeated use in demanding workshop conditions, providing long-lasting performance and stable accuracy.
• Metric fine thread precision (M11 x 1, right-hand, 4H): Specifically tuned for metric fine threads, ensuring reliable, repeatable measurements and compatibility with common mating components.

Using the JBO Thread Plug Gauge helps streamline quality control, shorten inspection times, and improve assembly reliability. Its rugged construction and precise design translate to fewer reworks and consistent results across production runs, giving teams confidence in every threaded connection.