JBO Thread Plug Gauge – Metric Fine Go/No-Go, Right Hand, 6H, M4.5 x 0.5 is a precision inspection tool designed to verify metric fine-threaded holes. It’s ideal for engineers, machinists, QA teams, and hobbyists who need fast, reliable checks to ensure mating parts fit correctly. This gauge is sized for the 6H tolerance class to support consistent, repeatable results in everyday production.

• Go/No-Go design for fast, unambiguous inspection: Allows quick pass/fail checks of threaded holes, reducing inspection time and minimizing guesswork during setup and assembly.
• Metric fine thread compatibility — M4.5 x 0.5, 6H: Specifically engineered for precise metric fine threads, ensuring accurate verification within the standard tolerance range.
• Durable hardened steel construction: Built to endure daily workshop use, delivering long-lasting performance and resistance to wear for reliable measurements.

By providing clear acceptance criteria and robust construction, this plug gauge helps you streamline quality checks, shorten downtime, and improve the reliability of threaded assemblies across projects and production runs.