The JBO Thread Ring Gauge (GO) is a precision inspection tool designed to verify external UNF threads when working with left-hand 7/8-14 threads in the 2A class. It enables quick, reliable checks during quality control and assembly, helping you confirm parts meet exact diameter standards with a single pass.

Made from hardened steel for outstanding wear resistance, this GO gauge stands up to frequent use in busy workshops, production lines, and field service environments, delivering long-lasting accuracy and dependable performance.

• Go/No-Go Verification at a Glance: Quickly confirm whether 7/8-14 UNF left-hand threads conform to the 2A class with a simple pass/fail check, speeding up quality control.
• Rugged Hardened Steel Construction: Built to withstand daily shop wear, resisting chipping and corrosion to preserve accuracy over time.
• Precisely Machined for Consistent Results: Tight tolerances ensure repeatable measurements across components, reducing guesswork and rework in the manufacturing process.

With the JBO Thread Ring Gauge (GO), you gain a reliable, time-saving tool that fits seamlessly into standard inspection routines. The combination of durable construction and precise dimensions helps you deliver consistent parts, minimize downtime, and maintain quality across every batch.