The JBO Thread Ring Gauge (NoGo) – UNF – Right Hand – 3A – 1 1/4 x 12 is a precision tool designed to verify external thread diameters to Unified standards. It’s built for engineers, inspectors, machinists, and quality teams who need quick, reliable checks on threaded parts.

Ideal for manufacturing, automotive, and aerospace environments, this NoGo gauge makes it easy to identify non-conforming threads and prevent misfits in assemblies. Crafted from hardened steel, it combines durability with dependable precision for daily use on the shop floor.

• NoGo design: The NoGo tolerance lets you instantly confirm a thread is out of spec, shortening inspection times and reducing the risk of incorrect assemblies.
• UNF 1 1/4 x 12, Right-Hand, 3A: Aligns with widely used external-thread standards, ensuring consistent measurements and compatibility with standard components.
• Hardened steel construction with knurled edge: Built to endure heavy use, resist wear, and provide a secure grip for repeatable, accurate gauging even in demanding environments.

Using this gauge streamlines quality control by delivering clear, repeatable results that inspectors and machinists can trust. It helps you confirm fitment early, reduce downtime from misfits, and maintain consistent workshop performance across projects and teams.