The JBO Thread Ring Gauge (NoGo) is a precision inspection tool designed to verify external UNEF threads in a left-hand configuration. Sized for 13/16 x 20, it’s ideal for manufacturing, automotive, aerospace, and quality teams that need fast, reliable verification of thread diameters.

With its NoGo face, the gauge makes non-conforming threads instantly recognizable, helping prevent improper fits and costly rework. Constructed from hardened steel, it provides durable, repeatable measurements in busy workshop environments.

• NoGo design for fast go/no-go verification: Quickly determine whether threads are out of tolerance, enabling rapid pass/fail decisions and reducing inspection time and downtime.
• Hardened steel construction for durability: Built to withstand daily use, resist wear and corrosion, and maintain accuracy over many measurement cycles with minimal maintenance.
• UNEF left-hand, 13/16 x 20, 2A tolerance compatibility: Ensures testing against the exact spec, delivering consistent, reliable verification and preventing mismatched gauges.

In daily QC and assembly workflows, this gauge provides a clear, reliable reference for external threads, helping you sort parts quickly, protect mating components, and maintain tight tolerances across batches. Its robust construction and precise geometry support higher throughput and more consistent results in aerospace, automotive, and general manufacturing environments.