The JBO Thread Plug Gauge is a precision tool designed for metric coarse internal threads. It provides a fast, reliable way for engineers, inspectors, machinists, and technicians to verify hole size and thread fit during manufacturing, assembly, and maintenance.

This version is configured for left-hand threads and targets M1.8 x 0.35 with a 6H tolerance, enabling accurate checks of LH threaded holes and ensuring correct component mating in your workflows.

• Go/No-Go design for quick acceptance: instantly determine if a hole is within specification by confirming a pass or fail in seconds, reducing inspection time and preventing misfits.
• Hardened steel construction for durability: built to endure rigorous use, delivering long tool life and consistent performance in demanding environments.
• Ergonomic, knurled body for secure handling: provides a confident grip and precise alignment during checks, improving speed and accuracy in busy work settings.

Overall, the JBO Thread Plug Gauge helps you streamline quality control, shorten downtime, and ensure reliable thread checks across batches. Its precise sizing and rugged build make it a dependable addition to any shop or quality lab that handles metric coarse LH threads.