The JBO Thread Ring Gauge (NoGo) is a precision tool for verifying external thread diameters on fasteners, fittings, and machined components. Ideal for manufacturing, automotive, and aerospace quality labs, it helps you quickly determine whether a part meets UNEF thread specifications.

Designed as a NoGo gauging solution, it provides an at-a-glance pass/fail check that prevents undersized or oversized threads from slipping into assemblies, saving time and reducing the risk of misfit parts.

• No-Go design for rapid conformity checks: The NoGo limit lets inspectors identify non-conforming threads quickly, ensuring only correct fits move forward.
• Hardened steel construction for durability: Built to withstand daily use, resisting wear to maintain accuracy over long service cycles.
• UNEF Left-Hand 2A, 1/4 x 32 sizing: Precisely matched to UNEF external threads, enabling reliable measurement and easy integration with existing tooling and processes.

Using the gauge in your QC workflow helps you reduce rework, speed up inspections, and improve overall thread quality across batches. The sturdy build and precise tolerances provide consistent results, giving your team confidence in every measurement.