The JBO Thread Ring Gauge (GO) for UNC is a precision inspection tool designed to verify external thread diameters on fasteners and components. Built for engineers, buyers, tradespeople, hobbyists, and quality-control teams, it helps you quickly confirm that right-hand UNC threads meet the exact 7/16 x 14 standard with reliable, repeatable results.

Crafted from hardened steel, this GO gauge delivers durability and wear resistance for long service life in demanding environments. Its straightforward design makes it quick and confident to identify conforming threads during quality checks and assembly steps.

• UNC GO gauge for external threads: Quickly verify outside thread diameters to the 7/16 x 14 UNC right-hand standard, speeding up inspections and reducing guesswork.
• Hardened steel construction for durability: Built to resist wear and maintain accuracy even in high-use shop environments, improving lifespan and return on investment.
• 3A-class precision with a user-friendly design: Delivers consistent results and easy identification of conforming parts, supporting efficient QC workflows.

With this gauge in your toolkit, you’ll streamline inspections, reduce rework, and ensure components meet the required standards before they reach production or customers. The durable, easy-to-use design supports fast checks on a busy shop floor, helping teams maintain tight tolerances and reliable performance across projects.