The JBO Thread Ring Gauge (GO) is a precision inspection tool designed for quality teams, manufacturers, and engineers who work with metric fine external threads. Sized for right-hand M20 x 0.5 threads and built to the 6g class, it helps you quickly verify that components meet exact thread specifications and are ready for assembly.

Made from hardened steel, this GO ring gauge stands up to daily workshop use, resisting wear and maintaining accuracy over time. Its refined finish and stable dimensions ensure you can count on consistent results across batches, reducing rework and variation in your production line.

• Precise GO gauge for metric fine M20 x 0.5 threads: Quickly check external thread diameters against standard tolerances and ensure components fit as intended.
• Hardened steel construction: Delivers durable, wear-resistant performance for long service life in demanding environments.
• Easy-to-read, user-friendly design: Enables fast identification of conforming parts, speeding up quality control and inspection workflows.

This gauge helps streamline your inspection routine, delivering reliable, repeatable results that support tighter quality control, fewer rejects, and smoother assembly processes. Whether in a manufacturing line, workshop, or lab, you can trust the JBO Thread Ring Gauge (GO) to maintain accuracy for metric fine external threads and stand up to daily use.