The JBO Thread Plug Gauge (GO) - Metric Fine - Left Hand - 6H - M42 x 2 is a precision inspection tool designed to quickly and reliably verify the correctness of internal threads in metric holes. Ideal for engineers, machinists, quality teams, and workshop technicians, it provides a straightforward go/no-go check that confirms holes meet exact size and pitch specifications without guesswork.

• Precise metric fine M42 x 2 GO gauge for left-hand threads: Quickly confirm correct thread size and pitch for left-handed holes, delivering a clear pass/fail result and reducing inspection time and rework.
• Hardened steel construction for durability: Built to endure daily use in challenging environments, delivering long-lasting performance and maintaining dimensional accuracy over many inspections.
• Ergonomic, knurled body for easy handling: Provides a secure grip from multiple angles, enabling fast, confident checks in busy workflows and ensuring consistent results.

Using this GO gauge helps streamline setup and quality control, enabling faster inspections, reducing downtime, and supporting reliable, repeatable thread verification across parts and assemblies.