The JBO Thread Plug Gauge is a precision Go/No-Go gauge designed for metric fine threads. It’s ideal for machinists, quality inspectors, and assembly teams who need fast, reliable checks to confirm that threaded holes will accept the mating part without guesswork. This gauge is specifically calibrated for M14 x 1.5, 6H tolerance, and is tailored for left-hand thread applications.

• Go/No-Go precision for metric fine threads: Quickly verify hole size and thread engagement with clear pass/fail indicators, speeding up setup and reducing rework.
• Durable hardened steel construction: Built to endure daily workshop use, resisting wear and maintaining calibration for long-lasting, dependable performance.
• Left-hand thread compatibility with 6H tolerance: Engineered to accurately check left-hand threaded holes, delivering repeatable results that align with your part specs.

Using this gauge helps you lock in quality early—saving time during production, preventing mating issues, and improving overall workflow accuracy. With dependable performance and a rugged build, it supports consistent results across inspections and assemblies.