The JBO Thread Plug Gauge (NoGo) - Metric Fine is a precision measuring tool designed for metric fine threads. It helps machinists, inspectors, and assembly technicians quickly verify internal threads, ensuring holes meet specifications before they are put into service.

Built for right-hand metric fine threads with a size specification of M148 x 1.5 and a 6H tolerance, this NoGo gauge delivers reliable, repeatable results in busy workshop environments. The gauge is crafted from hardened steel for long-lasting durability and wear resistance, so it stays accurate through repeated use. Its knurled body provides a secure grip, while the visible design details support fast, confident inspections.

• Precise metric fine NoGo verification: Quickly confirm that threaded holes do not exceed the lower limit, with a strict 6H tolerance that supports consistent, repeatable measurements.
• Hardened steel construction: Designed for durability and wear resistance in demanding shop conditions, delivering long life and stable performance over time.
• Ergonomic, user‑friendly design: Knurled, easy-grip body with clear orientation cues for fast, comfortable use and reduced operator fatigue during inspections.

This gauge helps streamline quality checks by providing clear, reliable pass/fail indications for metric fine threaded holes. By enabling accurate hole verification at the point of manufacture or maintenance, it supports improved workflow, reduces rework, and helps ensure components meet their precise threading requirements with confidence.