The JBO Thread Ring Gauge (NoGo) is a precision external thread gauge designed for Unified (UNF) right-hand threads in the 3/8 x 24 size, class 2A. It’s an essential tool for engineers, inspectors, and shop floor crews who need reliable, fast verification of thread fitment on fasteners, fittings, and machined components. The NoGo design provides an immediate, clear indication of non-conforming threads, helping you confirm correct engagement and prevent incorrect assemblies.

• NoGo Go/No-Go design for quick conformance: instantly reveals non‑compliant threads by showing a clear pass/fail result, speeding up quality checks and reducing inspection time on every part.
• Hardened steel construction for durability: built to withstand daily use in busy workshops, resisting wear and maintaining accurate tolerances long after initial measurements.
• Precise UNF Right-Hand 2A, 3/8 x 24 specification: engineered to match standard UNF threads, ensuring reliable compatibility with common components and reducing guesswork during inspection and assembly.

Used by manufacturing, automotive, and aerospace teams alike, this gauge helps streamline your inspection routine, minimizes downtime, and reinforces consistent results across operators. With durable materials and a clear, user-friendly design, it supports accurate thread verification from first part to final assembly, giving you confidence in every measurement and every fit.