The JBO Thread Ring Gauge (GO) – Metric Fine is a precision inspection tool designed to verify external thread diameters on small fasteners and threaded components. It’s ideal for machinists, inspectors, engineers, and workshop technicians who need reliable, fast checks to confirm parts conform to exact thread size and tolerance.

Crafted from hardened steel, this Right-Hand, metric fine GO gauge for M2 x 2 threads delivers durable, long-lasting performance in busy shops, inspection labs, and manufacturing lines. Its straightforward, user-friendly design makes it easy to use for both seasoned professionals and hobbyists, supporting efficient quality control and consistent results.

• Fast, go/no-go conformance check: Quickly determine if an external thread matches the GO size, speeding up inspections and reducing misfits in assemblies.
• Rugged hardened steel construction: Built to withstand daily handling and wear, maintaining accuracy and reducing downtime.
• Precise metric fine threading (M2 x 2, 6h, right-hand): Delivers accurate, repeatable measurements for small fasteners, ensuring compliance with standards and reliable QC data.

With the JBO GO ring gauge, you gain confidence that every component will thread in cleanly and consistently. It streamlines quality control, reduces rework, and supports reliable production outcomes by delivering quick, repeatable measurements that you can trust across jobs and teams.