The JBO Thread Ring Gauge (GO) is a precision inspection tool designed to verify external metric coarse threads. Sized for M27 x 3 and configured for left-hand threads, this GO gauge enables quick, pass/fail checks that help ensure parts meet exact thread standards.

Manufactured from hardened steel for lasting durability, it resists wear in busy workshop environments and maintains accurate measurements through heavy use. The left-hand, metric coarse configuration ensures dependable verification across a range of components and supports routine inspection tasks in quality control, manufacturing, and maintenance settings.

• Go/No-Go fast verification: Enables quick pass/fail checks of external metric coarse threads, reducing inspection time while ensuring consistent results across batches.
• Hardened steel durability: Built to withstand daily use in busy workshops, resisting wear and maintaining accurate measurements over long service life.
• Left-hand, M27 x 3 coarse sizing: Specifically engineered for left-hand threaded components in metric coarse series, providing reliable, repeatable verification for correct fitment.

Designed to integrate into standard QC workflows, the JBO Thread Ring Gauge (GO) helps you verify external threads in seconds, reducing measurement guesswork and costly rework. Its hardened steel body delivers long life in production environments, while the GO function provides clear accept/reject outcomes—so you can move parts through inspection with confidence and keep your assembly lines running smoothly.