The JBO Thread Ring Gauge (GO) for UNC threads is a right-hand, 2A GO gauge sized 2 1/4 x 4.5. It’s designed to deliver precise external thread checks, helping inspectors, machinists, and quality teams quickly verify components meet Unified UNC standards.

Crafted from hardened steel, the gauge resists wear and maintains tight tolerances in demanding environments. The GO configuration simplifies identifying conforming threads, speeding up quality control and reducing inspection time.

• Accurate GO-based UNC thread verification: Quickly confirms external thread size conforms to the GO limit, improving inspection speed and consistency.
• Durable hardened steel construction: Resists wear and maintains accuracy over long service life in busy workshops.
• Intuitive, user-friendly design: Helps operators identify compliant components at a glance, reducing setup time and errors.

With this gauge on hand, you gain a reliable, repeatable measurement tool that integrates smoothly into QA checks, minimizes rework, and supports consistent, high-quality threaded assemblies across your manufacturing and maintenance workflows.