The JBO Thread Plug Gauge is a metric fine Go/No-Go gauge designed to verify internal threads with speed and confidence. It’s tailored for right-hand M20 x 2 threads, making it ideal for machinists, quality inspectors, and assembly teams who need quick, reliable checks on threaded holes.

Built for durability in busy workshops, this gauge features hardened steel construction and a knurled handle for secure grip during use. The Go/No-Go design enables repeatable, straightforward inspections, helping you cut downtime and reduce the risk of misfits in critical assemblies.

• Go/No-Go precision for metric fine threads: Quickly determine if a threaded hole meets the required minimum and maximum limits, speeding up setup and quality checks.
• Rugged, wear-resistant construction: Hardened steel provides long-lasting performance and resistance to wear in daily use.
• Right-hand, 6G gauge for M20 x 2: Specifically matched to the 6G tolerance and the M20 x 2 fine-thread standard for reliable gauging.

This gauge helps streamline your workflow by delivering consistent, repeatable results, reducing downtime, and preventing misfits in critical components. Rely on a purpose-built tool that supports accurate decisions and efficient production.