The JBO Thread Ring Gauge (GO) for UNF threads is a precision tool designed to verify external thread diameters quickly and reliably. Made for quality control on production lines, maintenance shops, and hobby projects, it helps you confirm that parts meet the UNF 1-1/2 x 12 Right-Hand, 2A specification.

• UNF GO Gauge for 1-1/2 in x 12 TPI, Right-Hand, 2A: Precisely sized to verify external threads against the standard, enabling fast, confident Go/No-Go checks.
• Hardened steel construction: Built to resist wear and maintain accurate dimensions after repeated use in busy workshops.
• Easy-to-use, quick identification: Intuitive design lets you quickly determine whether threads conform, speeding up quality control and reducing downtime.

With the JBO GO Thread Ring Gauge, inspectors and machinists gain a reliable, fast tool for validating external threads. Its precise sizing and durable construction reduce rework, speed up acceptance testing on parts, and support consistent results across batches. Whether you’re running a high-volume production line, performing maintenance checks, or working on precision assemblies, this gauge provides clear go/no-go indication and long-lasting performance in demanding environments, helping you maintain quality and uptime.