The JBO Thread Ring Gauge (GO) is a precision tool designed to verify external metric threads quickly and reliably. Built for metric fine pitches, this GO gauge is specifically suitable for left-hand threaded components and features an M68 x 1.5 specification to match common inspection needs. It’s ideal for engineers, machinists, quality inspectors, and maintenance staff who need consistent, on-the-job accuracy.

Crafted from hardened steel, the gauge delivers durable, long-lasting performance in busy workshops and production lines. Its robust construction resists wear from routine insertions and handling, helping maintain accuracy through many cycles of use.

• Precise Go gauge for metric fine threads (M68 x 1.5): Quickly verify external thread diameter and conformity, enabling fast, confident decisions during inspection and quality control.
• Hardened steel construction: Built to endure daily handling and repeated use, delivering stable measurements and longer tool life in demanding environments.
• Left-hand thread compatibility: Designed to accommodate left-handed components, expanding inspection capabilities and reducing the risk of mis-sizing in specialized assemblies.

This GO ring gauge helps you identify properly conforming threaded components at a glance, streamlining QC workflows and supporting consistent, reliable results across batches. With its durable build and precise dimensions, you can trust it to contribute to smoother assembly, fewer reworks, and overall improvements in measurement reliability.