The JBO Thread Ring Gauge (NoGo) is a precision tool for checking external metric threads. It’s designed for engineers, machinists, inspectors, and hobbyists who need fast, reliable verification of thread diameters to the metric fine standard (M2 x 0.25, 6H) with right-hand threads.

Manufactured from hardened steel, this NoGo ring gauge resists wear in busy shops, delivering long-lasting accuracy. A knurled outer edge and clear sizing markings help you identify non-conforming parts quickly during routine quality checks.

• NoGo limit verification: Quickly confirms that the external thread diameter stays within the maximum allowed size for metric fine threads, enabling fast pass/fail decisions and reducing inspection time.
• Durable hardened steel construction: Built to withstand daily use with excellent wear resistance, ensuring consistent, repeatable measurements across many cycles in demanding environments.
• Ergonomic, easy-to-use design: Knurled outer edge provides a secure grip for quick handling, while precisely machined features allow fast alignment with the thread under test for accurate results.

In practice, this gauge speeds up inspection, reduces rework, and helps maintain quality across batches. Its robust construction and clear, everyday usability give you confidence in every measurement, making it a dependable companion for manufacturing, maintenance, and workshop workflows.