The JBO Thread Ring Gauge (NoGo) is a precision instrument for inspecting external threads on fasteners, fittings, and machined components. Designed for UNEF right‑hand threads in size 1‑1/8 x 18 with tolerance class 2A, it helps quality teams and shop floor personnel quickly verify that parts conform to Unified thread standards.

Made from hardened steel, this ring gauge stands up to daily use and maintains consistent accuracy over time. The NoGo design makes nonconforming threads obvious at a glance, reducing inspection time and preventing mismatches during assembly.

• Go/No-Go verification for UNEF external threads: Quickly confirm that the external thread meets the 1‑1/8 x 18 UNEF size in the 2A class; the NoGo limit provides an immediate pass/fail read.
• Durable hardened steel construction: Built to withstand daily shop use, resist wear, and preserve accuracy over time.
• Right-hand 2A tolerance‑aligned design: Precisely follows UNEF right‑hand external thread specs, ensuring repeatable measurements across parts and operators.

Using the JBO Thread Ring Gauge (NoGo) helps streamline thread inspections, reduce rework, and improve measurement consistency across teams. Its robust, standard-aligned design supports reliable quality control in manufacturing, automotive, and aerospace applications.