The JBO Thread Plug Gauge (NoGo) - Metric Fine is a precision tool designed to inspect internal metric fine-thread holes. With a right-hand orientation and a 6H tolerance for M78 x 1, it provides fast, reliable go/no-go checks that help you confirm holes meet exact specifications. The gauge is built for engineers, machinists, quality teams, maintenance technicians, and serious hobbyists who need consistent, repeatable results, even in busy shop environments.

• Go/No-Go verification for metric fine threads: A quick pass/fail check that confirms holes stay within tolerance, reducing guesswork, rework, and inspection time.
• Precisely sized for M78 x 1 right-hand threads: Specifically tuned for the common metric fine thread size, delivering reliable measurements across standard components.
• Durable hardened steel construction: Built to resist wear and maintain accuracy with daily handling, delivering long service life in demanding workshop conditions.

Using this NoGo gauge helps you speed up setup and inspection, enforce consistent quality across production runs, and minimize downtime. Its robust design and precise dimensions translate to more confident decisions in manufacturing, assembly, and maintenance tasks, ensuring threaded holes perform to specification over the life of the part.