The JBO Thread Ring Gauge (NoGo) is a precision tool for inspecting external thread diameters on fasteners and fittings. Built for UNC left-hand threads in size No. 12 x 24 with class 2A and rugged hardened-steel construction, it helps manufacturing, automotive, and aerospace teams quickly verify conformance and catch out-of-tolerance parts before assembly.

• No-Go design for fast conformance checks: The no-go feature provides an immediate visual cue for non-conforming threads, helping inspectors spot mismatches and prevent improper assemblies without guessing.
• Calibrated to UNC Left-Hand 2A No. 12 x 24: Precisely sized to the UNC left-hand, 2A class at No. 12 x 24, delivering reliable pass/fail results for common thread configurations.
• Hardened steel construction with knurled edge: Built to endure demanding shop use, resist wear, and offer a secure grip for repeatable measurements over the gauge’s long life.

With this gauge in your inspection kit, you’ll streamline quality checks, reduce rework, and improve fit reliability across assemblies. The durable build and clear No-Go indication empower teams to work faster with confidence, delivering consistent, accurate results in manufacturing, automotive, and aerospace environments.