The JBO Thread Ring Gauge GO - UNEF - Right Hand - 2A - 1/2 x 28 is a precision inspection tool designed to verify external thread diameters and thread form for fasteners and machined components. Built for engineers, machinists, inspectors, and technicians, this GO gauge helps confirm parts meet the UNEF 1/2-28 right-hand thread standard quickly and reliably.

Made from hardened steel, it withstands frequent use and harsh environments, delivering consistent measurements over time. Its straightforward design makes it easy to identify conforming parts at a glance, speeding up quality checks in busy workshops or labs.

• Hardened steel construction: Durable, wear‑resistant design that keeps tolerances consistent even after heavy, repeated use in demanding environments.
• Precise UNEF GO threading (1/2 x 28, right hand, 2A): Matches the exact external thread form and size for reliable go/no-go checks and quick pass/fail decisions.
• Ergonomic knurled outer edge: Provides secure grip and easy handling, helping you position and seat the gauge accurately in tight inspection setups.

With the JBO Thread Ring Gauge GO, you gain faster, more reliable thread inspections that support consistent quality across batches. The hardened steel construction and precise UNEF specifications minimize misreads and rework, while the easy-to-grip design accelerates setup on the shop floor, improving throughput and confidence in every measurement.