The JBO Thread Ring Gauge NoGo is a precision tool for verifying external UNC threads. Designed for right-hand, 2A class threads in 5/16 x 18, this gauge helps machinists, inspectors, and quality teams confirm that components meet Unified thread standards. Made from hardened steel, it provides durable, repeatable measurements in demanding environments such as manufacturing, automotive, and aerospace.

The NoGo design enables quick, at-a-glance identification of non-conforming threads, preventing misfits and reducing rework. Built to endure daily use, the gauge delivers reliable, long-lasting performance even with frequent handling and calibration checks.

• No-Go Design for Quick Conformity Checks: Quickly identify undersized or out-of-spec threads, speeding inspections and preventing faulty assemblies.
• Hardened Steel Construction: Built to withstand daily use, resisting wear on critical thread surfaces for a longer tool life and consistent measurements.
• UNC 2A Right-Hand 5/16 x 18 Size: Precisely matched to common external thread standards, ensuring accurate checks for standard fasteners used across industries.

This gauge helps you streamline inspection processes, improve measurement reliability, and protect downstream quality. With precise dimensions and durable materials, you’ll reduce downtime, improve first-pass results, and ensure that threaded parts fit correctly in automotive, aerospace, and general manufacturing applications.