The JBO Thread Ring Gauge (NoGo) – Metric Coarse is a precise inspection tool designed to verify the outer diameter of external threads on fasteners and threaded components. It helps quality teams, engineers, and workshop staff quickly determine whether parts meet their specifications and will fit correctly in assemblies. Built for metric coarse threads, it specifically supports M12 x 1.75, right-hand threads, with a 6g tolerance.

• NoGo upper-limit verification: provides a fast, clear indication of whether a thread is within the maximum size limit, speeding pass/fail decisions and reducing inspection guesswork.
• Durable hardened steel construction: withstands daily use in busy shops, resisting wear to maintain long-term accuracy and reliability in demanding environments.
• Metric coarse compatibility: M12 x 1.75, right-hand threads, 6g: tailored for common industrial fasteners, ensuring consistent, dependable checks that support proper fitment and quality control.

Using this gauge helps you streamline quality control workflows, cut inspection time, and reduce rework by clearly identifying components that fall outside the specified thread size. It supports reliable, repeatable measurements across batches, giving you confidence that metric coarse threaded connections will function as intended in every application.