The JBO Thread Plug Gauge (GO) is a precision inspection tool designed to verify internal metric threads in holes to exact standards. This GO gauge is the Metric Fine variant, right-handed, sized for M64 x 4 with a 6H tolerance, making it ideal for engineers, machinists, and quality teams who need quick, reliable thread checks. It helps ensure parts fit together correctly before assembly, reducing rework and transport delays.

Crafted from hardened steel, the gauge delivers exceptional durability and wear resistance in demanding shop environments. Its right-hand orientation and clear sizing allow for effortless identification of properly threaded holes, speeding up inspections and supporting consistent quality across production runs.

• Precise Metric GO sizing: Quickly verify that a hole accepts the M64 x 4 internal thread within the 6H tolerance, enabling reliable assemblies with minimal downtime.
• Hardened steel construction: Built to withstand daily use, maintaining dimensional accuracy and delivering long-lasting performance in busy workshops.
• Right-hand orientation and easy grip: Intuitive handling ensures fast, confident checks and reduces inspection errors in routine QC workflows.

Using the JBO Thread Plug Gauge (GO) streamlines your inspection process by delivering fast, accurate hole validation. The durable construction and precise metric sizing support consistent results, helping you improve throughput, reduce defects, and maintain high-quality standards across manufacturing and maintenance tasks.