The JBO Thread Ring Gauge (NoGo) is a precision tool designed to verify external thread diameters quickly and reliably. Sized for UNEF right-hand threads at 9/16 x 24 with a 2A tolerance class, this NoGo gauge helps production teams, machine shops, and maintenance crews confirm that fasteners and threaded components meet exact specifications.

Made for daily use in manufacturing, automotive, and aerospace environments, the gauge features a meticulous design and precise dimensions that support consistent inspections. The NoGo design provides an immediate indicator of non-conforming threads, helping you avoid improper fits and costly rework. Crafted from hardened steel, it stands up to routine handling and contact with tools and parts while preserving accuracy.

• Precise NoGo verification: Quickly identify threads that exceed tolerance, enabling fast pass/fail decisions and reducing rework.
• Durable hardened steel construction: Built for long life in busy shops—resists wear, corrosion, and deformation to maintain accuracy over time.
• Right-Hand UNEF 9/16 x 24, 2A standard: Directly matched to common fastener sizes and industry standards for clear, reliable measurements on every inspection.

In use, this gauge streamlines quality control by delivering dependable, repeatable measurements that support proper fit and function across assemblies. It helps shorten inspection cycles, improve first-pass acceptance, and reinforce confidence in your manufacturing or maintenance workflows.