The JBO Thread Ring Gauge (GO) - Metric Fine is a precision tool designed to verify external thread diameters for components with M13 x 1 threads. It’s an essential instrument for engineers, inspectors, machinists, and maintenance teams who need reliable conformance checks during assembly, quality control, or repairs.

Built as a GO gauge with a right-hand, metric-fine specification, it provides quick, unambiguous results. Crafted from hardened steel, this gauge delivers long-lasting performance in demanding workshop environments.

• Accurate GO gauge for M13 x 1 threads: Quickly confirms whether a part’s external thread diameter matches the required size, enabling fast pass/fail decisions during quality control.
• Hardened steel construction for durability: Resists wear and deformation, maintaining accuracy through thousands of measurements in daily use.
• Right-hand metric fine specification: Fits standard fine-pitch M13 x 1 threads and typical right-hand threads across a wide range of applications.

This gauge streamlines thread inspection by delivering clear, repeatable results in seconds, helping you reduce rework and keep production or maintenance work on schedule. By catching out-of-tolerance parts early, it enhances measurement reliability and overall workflow, while its robust build ensures dependable performance for years in busy shops and field environments.