The JBO Thread Ring Gauge (GO) is a precision tool designed to quickly verify external metric threads. Specifically, it checks go/no-go compliance for left-hand M64 x 1.5 threads in 6g tolerance, making it ideal for quality control, machining, and maintenance across engineering, manufacturing, and workshop environments.

Made from hardened steel for long life, with a knurled outer surface for secure handling, this gauge withstands daily use in busy shops while delivering repeatable, accurate checks.

• Go/No-Go Quick Verification: Instantly confirm conformance of external left-hand metric threads (M64 x 1.5, 6g) in a single check, reducing inspection time and rework.
• Durable Hardened Steel Construction: Built to resist wear in demanding environments, maintaining calibration and delivering reliable performance over many cycles.
• User-Friendly, Grippy Design: Knurled exterior and straightforward alignment make it easy to use with gloves, improving handling and reducing setup errors.

Integrate this gauge into your QC workflow to make confident, fast thread inspections that support consistent part quality, minimize downtime, and help ensure parts meet exacting standards.