The JBO Thread Ring Gauge (NoGo) — Metric Fine, Left Hand, 6g, M16 x 1.5 is a precision inspection tool designed for quick, reliable checks of external thread diameters. Ideal for machinists, quality engineers, toolmakers, and assembly teams, it helps confirm that threaded components meet exact size and tolerance specifications without slow, manual measurements.

Made from hardened steel for long life and wear resistance, this NoGo ring gauge delivers consistent, repeatable results in busy workshop environments. Its straightforward design supports fast identification of non-conforming threads, speeding up quality control and helping you maintain tight production standards.

• Fast non-conforming thread detection: Enables quick pass/fail assessment of external threads against the NoGo tolerance, reducing inspection time and rework.
• Durable hardened steel construction: Built to withstand daily use in demanding shops, providing stable, accurate measurements over many cycles.
• Specifically tuned for metric fine LH thread M16 x 1.5 (6g): Ensures reliable checks for left-hand, fine-pitched threads, improving accuracy for LH components.

With the JBO Thread Ring Gauge, you gain confidence in every measurement. The ring’s precise dimensions support consistent results across batches, streamline your inspection workflow, and help you document compliance with standard thread specifications. Choose this gauge to simplify setup, speed up quality checks, and protect your process from out-of-tolerance parts.