The JBO Thread Ring Gauge (NoGo) - Metric Fine - Left Hand - 6g - M40 x 2 is a precision inspection tool designed to confirm the external threads on fasteners, fittings, and mating parts meet the Metric Fine standard. It’s ideal for engineers, machinists, quality teams, and assembly technicians who need a reliable go/no-go check to verify thread fit and adherence to specifications.

Crafted from hardened steel for lasting accuracy, this NoGo gauge resists wear in busy workshops and production lines. Its left-hand configuration ensures compatibility with left-handed threaded components, making setup quick and inspection straightforward in real-world applications.

• NoGo precision for Metric Fine threads: Quickly verify external thread max material condition on M40 x 2, enabling fast go/no-go decisions and consistent quality across parts.
• Hardened steel construction: Durable, wear-resistant gauge that maintains tight tolerances through repeated use in challenging shop environments.
• Left-hand orientation for seamless integration: Specifically designed for left-handed threads, simplifying alignment and reducing inspection time.

By using this ring gauge, inspection becomes faster and more reliable, helping you catch non-conforming parts before they reach assembly, reduce downtime, and maintain process capability. The robust construction and clear, repeatable measurements give your team confidence in every measurement, whether you’re validating incoming components, in-process checks, or final QC.