The JBO Thread Ring Gauge (GO) for UNF threads is a precision inspection tool designed to verify external thread diameters on fasteners, fittings, and machined components. This Go gauge is tailored for right-hand UNF threads sized 9/16-18 and helps ensure the minimum acceptable diameter is met, enabling reliable fit and consistent performance across parts.

Built from hardened steel for exceptional durability, the gauge resists wear in demanding shop environments. A knurled outer surface provides a secure grip for quick, repeatable checks, and the compact ring design supports easy one-handed use during routine quality control and in-line inspections.

• Precise UNF Go gauge for 9/16-18 right-hand threads: Confirms the minimum thread diameter, enabling fast pass/fail checks and reducing rework by catching out-of-spec parts early.
• Hardened steel construction: Delivers long service life and resistance to wear, maintaining accuracy even in high-volume production environments.
• Ergonomic, knurled ring design: Provides secure grip and easy handling for rapid, one-handed measurements, even with gloves on.

Designed to integrate smoothly into standard QC workflows, this Go gauge provides a reliable, repeatable method to validate external UNF thread diameters. It helps streamline inspections, improve assembly reliability, and reduce downtime, delivering confidence to engineering, manufacturing, and maintenance teams on every part check.