The JBO Thread Ring Gauge (NoGo) - Metric Fine is a precision external-thread inspection tool designed to verify diameters on metric fasteners and threaded components. It’s ideal for engineers, machinists, quality inspectors, and workshop technicians who need fast, reliable checks against M21 x 1 fine-pitch specifications. The NoGo gauge provides a clear pass/fail indication to confirm threads meet the required standard and prevent non-conforming parts from moving forward in production.

Crafted from hardened steel for excellent wear resistance, this gauge delivers durable performance in busy shop floors and demanding environments. Its right-hand orientation and 6e specification ensure you’re using the correct standard for consistent, repeatable measurements across your QA workflow.

• Durable hardened steel construction: Built to withstand daily use, resist wear, and maintain accurate measurements in demanding workshops.
• Fast NoGo verification for quick quality control: Enables immediate pass/fail checks to identify non-conforming threads, increasing inspection speed and reducing downtime.
• Metric Fine M21 x 1 compatibility (Right Hand, 6e): Precisely calibrated for the intended thread standard, delivering reliable, repeatable results with minimal setup.

Using the JBO Thread Ring Gauge (NoGo) improves your workflow by delivering clear, dependable checks that help you catch out-of-tolerance parts early, reduce rework, and ensure consistent performance across threaded assemblies. It supports more efficient quality control, shorter inspection cycles, and greater confidence in meeting exacting dimensional requirements.