The JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 4h - M21 x 1 is a precision tool designed to verify external threads quickly and reliably. It’s ideal for engineers, inspectors, machinists, and workshop technicians who need to confirm that components meet exact outer diameter and pitch specifications.

With a hardened steel body and finely machined surfaces, this NoGo ring gauge offers long-lasting durability in demanding environments. Use it during incoming, in-process, or final inspections to quickly identify non-conforming threads, helping you maintain quality and streamline assembly with confidence.

• Hardened steel construction for lasting durability: Built to resist wear and maintain accuracy through daily use in busy workshops, reducing replacement and calibration needs.
• Precisely sized for Metric Fine M21 x 1 right-hand threads: Engineered to deliver consistent, repeatable measurements that align with your thread specification and mating parts.
• Clear NoGo design for quick pass/fail inspection: Features an unmistakable geometry and finish that enable fast identification of out-of-tolerance parts, speeding up quality checks.

Incorporating the JBO Thread Ring Gauge into your workflow helps you tighten tolerance control, cut inspection time, and reduce rework. It supports reliable, repeatable results across operators and shifts, ensuring components thread correctly and perform reliably in every assembly.