The JBO Thread Ring Gauge NoGo is a precision instrument for verifying external UNC threads on left-handed components. It is calibrated for the 2A class and sized No. 5 x 40, making it a reliable choice for production QA in manufacturing, automotive, and aerospace environments.

• NoGo limit for fast conformance checks: The NoGo feature provides a clear pass/fail indication for non‑conforming UNC threads, helping inspectors quickly identify rejects and keep production moving with fewer errors.
• Left-hand UNC 2A compatibility: Specifically engineered for left-handed threads in the 2A tolerance class, ensuring accurate measurements and preventing mix-ups when inspecting reverse-threaded components.
• Durable hardened steel construction: Built from hardened steel with a precise finish to withstand daily shop use, resist wear, and maintain stable, reliable readings over many inspections.

Using this gauge streamlines quality checks, reduces downtime, and improves the reliability of threaded assemblies. Its durable construction and precise sizing help maintain tight tolerances across shifts, so you can trust every measurement to support accurate fit and function in your assemblies.