The JBO Thread Ring Gauge (NoGo) is a precision tool designed to verify external UNC threads, specifically right-hand 7/16 x 14 with a 3A class tolerance. Built for engineers, machinists, inspectors, and shop personnel, it helps ensure components meet Unified thread standards quickly and reliably.

With its No-Go design, this gauge makes it easy to identify non-conforming threads at a glance, reducing guesswork, rework, and production downtime. Crafted from hardened steel, it stands up to daily use in demanding manufacturing environments while maintaining accurate, repeatable measurements.

• No-Go design for quick failure detection: Enables rapid pass/fail checks—if the gauge cannot clear the threads, the part is out of tolerance, shortening inspection time and preventing misfits.
• UNC Right-Hand 3A, 7/16 x 14 specification: Precisely machined to a standard that ensures consistent, repeatable measurements across parts and suppliers.
• Hardened steel construction: Built for durability in busy workshops, delivering long tool life and reliable results in daily use.

This gauge streamlines quality control by providing clear, reliable verification of external thread diameters, helping you speed up inspections, reduce downtime, and ensure proper thread engagement in assemblies the first time.