The JBO Thread Ring Gauge (NoGo) – UNC – Right Hand – 2A – 1/4 x 20 is a precision inspection tool designed to verify external thread diameters against the Unified Thread Standards. It’s ideal for manufacturers, automotive shops, aerospace maintenance, and workshop environments that rely on accurate fastener fitment.

With its No-Go design, inspectors can quickly identify non-conforming threads, helping to prevent improper assemblies and reduce rework. Crafted from hardened steel, this gauge withstands daily use in busy inspection rooms while maintaining reliable, repeatable measurements.

• No-Go limit for fast pass/fail: Instantly determine out-of-spec threads by attempting to thread the gauge; if it won’t screw on, you have a clear, reliable indication to reject the part, speeding up QA and reducing scrap.
• UNC 1/4 x 20 (Right Hand, 2A) compatibility: Precisely aligned for the standard 1/4-20 external thread with Right Hand orientation and class 2A tolerance, delivering consistent measurements across parts.
• Hardened steel construction for durability: Built to resist wear and maintain accuracy through frequent use, ensuring long service life in busy production and inspection environments.

Using the gauge streamlines your thread inspection workflow, helping you confirm proper fitment quickly, maintain quality across batches, and reduce downtime. It provides a reliable reference that supports compliant, repeatable results in every part tested.