The JBO Thread Plug Gauge (NoGo) – Metric Fine is a precision inspection tool designed to verify metric fine threaded holes. It’s ideal for engineers, inspectors, machinists, and maintenance teams who need fast, reliable go/no-go assessments to confirm holes meet specification.

Specifically built for right-hand threads with a 6H tolerance and a size of M135 x 3, this gauge delivers consistent measurements for demanding inspection tasks. Crafted to withstand regular use, it helps you detect out-of-tolerance holes early in the process and keep production moving.

• Precise metric fine threading verification: Delivers accurate checks for metric fine threads, enabling quick pass/fail decisions and consistent inspection results.
• Rugged hardened steel construction: Built to resist wear and maintain tolerances in busy workshops, reducing the need for frequent replacements.
• Right-hand 6H M135 x 3 compatibility: Designed for clear compatibility with standard hole sizes, providing predictable measurements and smoother quality control.

Using the JBO Thread Plug Gauge helps streamline your quality checks, cut down rework, and improve overall consistency in threaded-hole inspections—from incoming parts to finished assemblies. It supports reliable, repeatable results across varying workloads and environments.