The JBO Thread Ring Gauge (NoGo) is a precision inspection tool designed to verify external Unified National Coarse (UNC) threads quickly and reliably. Built for professionals across manufacturing, automotive, aerospace, and workshop environments, this NoGo ring gauge helps you confirm that threaded parts meet UNC standards and will mate correctly with fasteners and fittings.

Designed for right-handed UNC 2A threads in a 1 1/4 x 7 size, this gauge delivers a tangible, easy-to-interpret check of thread diameter and fit. Its hardened steel construction provides lasting durability in daily shop use, helping you trust the results year after year.

• NoGo Design for Quick Conformance Checks: Easily identify non-conforming threads during inspection, reducing guesswork and rework by providing a clear pass/fail indication.
• UNC 2A Right-Hand Compatibility: Precisely sized to match the 1 1/4 x 7 UNC right-hand threads, delivering reliable external diameter verification and consistent inspection results.
• Hardened Steel Construction: Built to endure frequent handling and tough shop conditions, delivering long tool life and stable accuracy over time.

Using this gauge helps you streamline your quality control workflow, minimize assembly issues, and maintain tighter thread tolerances across production runs. Its robust, dependable design gives you confidence in every measurement, whether you’re performing routine checks or validating critical components for aerospace, automotive, or general manufacturing applications.