The JBO Thread Ring Gauge (GO) for metric coarse threads is a precision inspection tool designed to verify external M27 x 3 threads quickly and reliably. Ideal for machinists, quality control teams, suppliers, and precision hobbyists, it helps ensure every threaded component meets exact specifications before mating with nuts, fittings, or housings.

• Accurate GO verification for M27 x 3 coarse threads: Quickly confirms that the external thread diameter and pitch align with the intended specification, enabling fast pass/fail checks and reducing rework.
• Right-hand thread orientation for standard applications: Configured for common right‑hand metric threads, delivering consistent results across parts and suppliers you work with.
• Hardened steel construction for durability: Built to withstand daily use in busy inspection environments, maintaining dimensional stability and long service life.

Using the GO ring gauge in your quality workflow supports precise, repeatable measurements, helping you prevent mismatches, minimize downtime, and ensure reliable performance of threaded assemblies from incoming inspection through final assembly.