JBO Thread Ring Gauge (NoGo) is a precision tool designed to verify external thread diameters to Unified standards. It’s ideal for quality control teams, machinists, inspectors, and workshop technicians who need reliable, fast checks on threaded components. Specifically, it covers the UNF, right-hand 5/16 x 24 threads, with a NoGo design that helps you quickly identify non-conforming parts.

• No-Go design for fast, at-a-glance inspection: The NoGo feature makes it easy to spot threads that are out of tolerance, helping you reject imperfect parts quickly and reduce inspection time.
• UNF, Right Hand, 2A tolerance for precise checks: Designed to verify 5/16 x 24 UNF threads against established standards, supporting accurate fitment in assemblies that demand reliable engagement.
• Hardened steel construction for durability: Built to withstand repetitive use in busy environments while maintaining dimensional accuracy and long tool life.

used across manufacturing, automotive, and aerospace settings, this gauge helps you maintain consistent thread verification, minimize downtime, and ensure components meet required specifications. Its sturdy build and precise design deliver dependable results day after day, giving you confidence in every measurement and every assembly.