The JBO Thread Ring Gauge (NoGo) UNC Right Hand 2A 3/8 x 16 is a precision tool designed to verify external UNC threads on fasteners, shafts, and fittings. It’s built for professionals across manufacturing, automotive, and aerospace, as well as machine shops and quality inspectors, to confirm that parts meet Unified thread standards.

Made from hardened steel for sustained use, this gauge features a knurled outer edge for secure handling and a clear No-Go face that quickly reveals out‑of‑spec threads. The No-Go design makes it easy to identify parts that won’t thread properly, helping prevent misfits and costly rework.

• Fast No-Go verification: Quickly identifies non-conforming threads to prevent costly assembly errors and rework, speeding up quality checks.
• Rugged hardened steel construction: Built to endure daily shop use, resisting wear, corrosion, and damage for long tool life.
• UNC Right Hand 2A, 3/8 x 16 precise sizing: Calibrated to exact UNC 3/8-16 dimensions and 2A class, ensuring reliable fit and compatibility with standard gauging equipment.

This gauge supports a streamlined, repeatable measurement process that helps you maintain consistent thread quality, reduce downtime, and provide clear, auditable results for quality control. It’s a reliable, durable addition to any shop floor or inspection station, ideal for manufacturing, maintenance, and repair environments where correct thread engagement matters.