The JBO Thread Ring Gauge (NoGo) for UNF – Right Hand – 3A – 1 x 12 is a precision tool designed to verify external UNF threads on fasteners, fittings, and threaded components. Built for engineers, machinists, quality inspectors, and workshop technicians, its compact 1 x 12 size makes it easy to handle on busy benches while delivering reliable go/no-go checks.

With its NoGo design, this gauge provides a clear pass/fail indication for non-conforming threads, helping prevent mismatches before parts move to assembly or service. Crafted from hardened steel, it resists wear and maintains accuracy in demanding environments, ensuring long service life and consistent results.

• NoGo Quick-Check for UNF Threads: Delivers rapid, unambiguous pass/fail verification of external UNF threads, reducing inspection time and preventing misfits in production.
• Right-Hand UNF, 3A Class Fit: Precisely matched to standard right-hand UNF threads and 3A tolerances for dependable, repeatable measurements across parts and assemblies.
• Hardened Steel Construction: Built for durability and longevity, resisting wear and maintaining accuracy through frequent handling and demanding use.

This gauge enhances quality control by speeding up inspections, improving fit and performance in the field and on the shop floor, and reducing downtime. Its robust construction and precise design give you confidence that each threaded part meets standards, supporting consistent results, lower scrap rates, and smoother workflow across manufacturing and maintenance processes.