The JBO Thread Plug Gauge is a precision inspection tool designed specifically for metric coarse threads. It enables quick, reliable checks of threaded holes, helping ensure proper fit and smooth operation of mating components.

This Left-Hand (LH) variant, sized for 6G tolerance with an M12 x 1.75 pitch, is built for demanding applications in machining, automotive, and industrial assembly. Crafted from hardened steel, it stands up to repeated use and harsh workshop conditions, delivering long-lasting performance.

• Go/No-Go quick checks for M12 x 1.75 coarse threads: Quickly determine whether a threaded hole accepts the plug gauge or should be rejected, streamlining quality control and reducing guesswork.
• Left-Hand thread compatibility and 6G class: Specifically tuned for LH assemblies, ensuring correct engagement and consistent measurement across left-hand components.
• Rugged, hardened steel construction: Built to endure busy shop environments, resisting wear and providing reliable performance over many cycles.

This gauge helps you speed up inspection, reduces downtime, and improves consistency in threaded hole qualification. Its durable build and LH-specific design support reliable, repeatable measurements, so your team spends less time rechecking and more time on productive work.