The JBO Thread Plug Gauge is a precision tool designed for checking metric fine threads in threaded holes. It is ideal for engineers, machinists, inspectors, and hobbyists who need fast, reliable pass/fail verification for M6 x 0.5 threads.

This Left Hand version features 6H tolerance, ensuring accurate and repeatable gauging of left-hand threaded holes across assemblies and maintenance tasks.

• Go/No-Go design for fast acceptance checks: Quickly verify both minimum and maximum thread limits, reducing guesswork and rework during assembly or quality control.
• Left Hand / M6 x 0.5 compatibility: Specifically configured for left-hand metric fine threads, providing reliable validation for this common size and pitch.
• Hardened steel construction for durability: Built to resist wear and keep measurements stable through frequent use in busy workshops.

By using this gauge, you gain faster inspections, more consistent hole quality, and fewer misfits in production or maintenance tasks. The robust, long-lasting construction means reliable performance over time, making it a dependable addition to any toolroom, workshop, or field service kit.