The JBO Thread Plug Gauge (NoGo) – Metric Fine is a precision inspection tool designed for internal metric fine threads. Specifically configured for right-hand M65 x 3 threads within the 6H tolerance class, it helps inspectors, machinists, and quality teams quickly verify threaded holes meet specification.

Made from hardened steel, this plug gauge delivers durable, long-lasting performance in busy workshops and demanding environments, ensuring reliable measurements shift after shift.

• Right-hand metric fine threading (M65 x 3, 6H): Precisely matches standard internal thread geometry to enable accurate NoGo verification for fine-pitch holes.
• Durable hardened steel construction: Resists wear and maintains accuracy over time in daily use.
• NoGo verification for reliable hole checks: Quickly identify out-of-tolerance holes, reducing downtime and rework with confidence.

This gauge supports efficient, repeatable inspections that help you maintain consistent thread quality across parts and production runs, delivering clearer pass/fail decisions and smoother workflows.