The JBO Thread Ring Gauge (NoGo) for UNC left-hand threads is a precision inspection tool built to verify external thread diameters with speed and confidence. Designed for use in manufacturing, automotive, and aerospace environments, it provides a straightforward go/no-go check to confirm thread conformity and proper fitment.

This gauge is specifically tailored to UNC 2A left-hand threads in the 1 1/2 x 6 size, delivering accurate, repeatable readings that owners and inspectors can trust across shifts. Its simple, robust design makes it easy to integrate into standard inspection routines and work seamlessly with other thread gauges.

• No-Go design for rapid pass/fail checks: Quickly identify non-conforming threads, reducing inspection time and minimizing the risk of assembling mismatched components.
• UNC 2A Left-Hand sizing: Precisely machined to the 1 1/2 x 6 left-hand UNC specification, ensuring reliable verification of external threads and correct assembly fit.
• Hardened steel construction: Built to endure demanding shop conditions with lasting accuracy, resisting wear and maintaining tight tolerances over time.

Using this gauge helps you streamline quality control, cut down rework, and ensure that every threaded part meets the required standards before it moves to final assembly. Its durable build and precise dimensions give you confidence in every measurement and support consistent results across your production line.