The JBO Thread Ring Gauge (NoGo) is a precision inspection tool designed to verify external threads on metric coarse fasteners. It’s ideal for engineers, machinists, quality teams, and workshop professionals who need fast, reliable checks to ensure parts meet the M12 x 1.75 left-hand coarse thread standard.

Crafted from hardened steel, this gauge delivers durable, long-lasting performance in busy environments. Its straightforward design makes it easy to use, helping you quickly identify non-conforming components and keep production and assembly workflows on track.

• NoGo verification for fast pass/fail checks: Quickly determine whether a threaded component is within the maximum tolerance, enabling decisive quality checks and reducing inspection time when sorting good from non-conforming parts.
• Durable hardened steel construction: Built to withstand daily use in demanding settings, resisting wear to maintain accurate readings over time and across lots.
• Left-Hand, Metric Coarse compatibility (M12 x 1.75, 6e): Specifically engineered for left-hand coarse threads with the 6e specification, ensuring reliable measurements for the exact thread configuration you’re inspecting and minimizing setup mistakes.

With the JBO Thread Ring Gauge, you gain a dependable tool that supports consistent quality checks, speeds up inspections, and helps ensure correct fitment of left-hand M12 x 1.75 components across your manufacturing or maintenance processes.