The JBO Thread Ring Gauge GO for metric coarse threads is a precision inspection tool designed to verify external threads quickly and reliably. Sized for M20 x 2.5 left-hand coarse threads, it helps technicians, inspectors, and quality teams confirm that parts will thread correctly with mating components.

Machined from hardened steel for excellent wear resistance, this gauge is built to endure busy shop floors. The knurled outer edge provides a secure grip, even with gloves, and the 6g tolerance class ensures consistent go/no-go results that align with industry standards.

• Precise metric coarse GO gauge: Quickly verify external threads to ensure M20 x 2.5 left-hand components meet spec, reducing guesswork and rework.
• Hardened steel construction: Built to resist wear in busy inspection environments, maintaining accuracy over thousands of measurements.
• Left-hand, 6g tolerance: Specifically designed for left-hand threads with standard coarse-thread tolerance, ensuring correct fitment and consistent results in your QA process.

Using this gauge streamlines inspections, shortens setup time, and reduces the risk of mismatched threads. It supports reliable quality control, improves workflow, and helps your team deliver precise, dependable assemblies on time.