The JBO Thread Plug Gauge (NoGo) — Metric Fine is a precision inspection tool designed to verify metric fine threaded holes. Sized for M120 x 3 with a 6H tolerance and right-hand threading, it’s ideal for quality control, maintenance, and assembly across machining, fabrication, and engineering environments.

Made from hardened steel for durability, this NoGo gauge resists wear and maintains accuracy through repeat use in demanding workshop conditions, delivering reliable measurements shift after shift.

• Durable hardened steel construction: Built to resist wear and maintain accuracy in busy workshop environments, delivering long service life.
• Precise Metric Fine thread, M120 x 3 with 6H tolerance: Engineered to provide reliable, repeatable no-go measurements within a strict tolerance class for high-confidence inspections.
• Ergonomic, knurled handle and right-hand design: Easy to grip and insert in tight holes, ensuring consistent readings and quick checks in daily use.

Using this gauge speeds up inspections, reduces guesswork, and helps maintain consistent quality across parts and batches. Its robust construction and precise tolerances ensure dependable results, even in high-volume production environments.