The JBO Thread Plug Gauge (NoGo) – Metric Fine is a precision inspection tool designed to verify metric fine threaded holes with confidence. It’s suitable for machinists, inspectors, engineers, and shop technicians who need reliable, fast checks to confirm parts meet exact specifications.

Made from hardened steel and featuring a knurled body for a secure grip, this NoGo gauge provides durable, long-lasting performance in demanding environments. It is specifically designed for right-hand metric fine threads, including size M140 x 4 with a 6H tolerance class.

• Hardened steel construction: Durable and wear-resistant for long-lasting accuracy in busy work environments.
• Knurled grip for secure handling: Non-slip texture provides a comfortable, confident grip and quick setup, even with gloves.
• Metric Fine NoGo gauge for 6H, M140 x 4 right-hand threads: Precisely matched to the specified thread size, enabling reliable go/no-go checks to confirm holes meet spec.

With this gauge in your toolkit, you’ll streamline threaded-hole inspections, reduce guesswork, and speed up quality control. The NoGo design helps you quickly determine whether holes are within tolerance, while the hardened steel construction ensures consistent results across shifts and processes. Ideal for production lines, job shops, and maintenance teams, this gauge supports accurate, repeatable checks for metric fine threads from design to final assembly.