The JBO Thread Plug Gauge (NoGo) is a metric fine thread gauge used to verify internal threads in holes. It is specified for M56 x 1.5 with a 6H tolerance and right-hand orientation, helping machinists, inspectors, and assembly teams quickly confirm that threaded holes meet spec before components move to the next stage.

Made from hardened steel, the NoGo gauge resists wear and maintains precise dimensions through repeated use in busy workshops. Its robust construction delivers dependable performance in demanding environments.

• Accurate NoGo verification for metric fine threads: Quickly confirms that a hole meets the M56 x 1.5 size within the 6H tolerance, reducing guesswork and the need for rework.
• Durable hardened steel construction: Built to withstand daily use, delivering long tool life and consistent measurements in demanding shop settings.
• Right-hand orientation for consistency: Designed for standard right-hand threads, ensuring reliable, repeatable checks across operators and production runs.

This plug gauge helps ensure threaded holes are properly sized before assembly, improving workflow efficiency, reducing downtime, and supporting reliable, repeatable results across quality checks and manufacturing processes.