The JBO Thread Plug Gauge (NoGo) is a precision inspection tool designed for metric fine threads. It’s ideal for machinists, quality inspectors, maintenance technicians, and assembly teams who need fast, reliable verification of threaded holes. This NoGo gauge is calibrated for Right Hand, 6H tolerance, and M50 x 3 size to confirm holes meet exact specifications.

Constructed from hardened steel for lasting accuracy, the gauge stands up to daily use in busy workshops. A knurled body provides a secure grip, while the color-coded element helps you identify the gauge quickly in your toolkit, speeding up setup and reducing handling errors.

• Metric-fine NoGo gauge for M50 x 3 threads: Precisely configured to verify metric fine threaded holes at the 6H tolerance; helps you determine if a hole is within spec or oversized without guesswork.
• Hardened steel construction for long life: Durable, wear-resistant core that maintains accuracy through repeated usage in demanding environments.
• Ergonomic, quick-check design with clear handling cues: Knurled grip and quick-identification features enable fast, repeatable checks with minimal downtime.

Using this gauge helps you quickly confirm hole size, reduce rework, and improve overall quality. It supports a smoother inspection workflow, delivers consistent results across parts, and gives you confidence when certifying components for assembly or shipment.