The JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6h - M39 x 2 is a precision tool designed to verify external thread diameters against the metric fine standard. It’s ideal for engineers, machinists, quality control professionals, and workshop technicians who need fast, reliable checks that components meet exact specifications.

Crafted from hardened steel, this GO ring gauge delivers exceptional durability and wear resistance in demanding environments. Its right-hand orientation and compatibility with M39 x 2 (6h) threads provide consistent, easy-to-interpret checks that integrate smoothly into QA routines, setup processes, and assembly workflows.

• Fast go/no-go verification: Quickly determine whether a part’s external thread conforms to the metric fine M39 x 2 (6h) standard, speeding up inspection and reducing rework.
• Hardened steel construction: Built to withstand daily shop wear, resisting dents and wear to maintain long-lasting accuracy and reliability.
• Precise right-hand metric fine compatibility: Specifically matched to standard threads, delivering repeatable results that support consistent quality checks and documentation.

Using the JBO Thread Ring Gauge (GO) helps streamline quality control, shorten inspection cycles, and improve confidence that threaded components will fit correctly in final assemblies. It supports faster setup, fewer trial fits, and more reliable outcomes across production and inspection stages.