The JBO Thread Ring Gauge (NoGo) is a precision tool designed to verify external metric fine threads. Tailored for M12 x 0.5 size and a left-hand configuration, this ring gauge helps technicians, engineers, and quality teams quickly confirm that components meet the required thread dimensions.

Made from hardened steel, the gauge delivers durable, long-lasting performance in busy workshops and production lines. Its NoGo design supports fast, clear pass/fail checks, aiding accurate inspection of threaded components and ensuring compliance with standards without guesswork.

• Precise metric fine-thread validation (M12 x 0.5): Enables quick, reliable go/no-go verification of external threads, helping you confirm diameter and pitch meet exact specifications.
• Hardened steel construction: Built to resist wear and maintain accuracy through many cycles of use, providing dependable performance in demanding environments.
• Left-hand gauge with clear NoGo signaling: Optimized for left-hand threads and easy identification, delivering fast orientation and consistent results across operators.

Using this gauge streamlines quality control by delivering fast, unambiguous thread checks. Its robust construction minimizes downtime from rework, supports consistent assembly across batches, and gives you confidence that every fastener or fitting conforms to exact metric fine-thread standards.