The JBO Thread Ring Gauge (GO) - UNJC - Right Hand - 3B - 1/4 x 20 is a precision inspection tool used to verify external thread diameters against the UNJC standard. It’s designed for engineers, quality teams, machinists, and inspectors to quickly validate parts meet the required thread size and tolerance.

Crafted from hardened steel for standout durability, this 3B GO gauge delivers long-lasting performance in busy workshops and production lines. The simple ring design makes it easy to identify compliant components at a glance, helping your QC processes stay fast, accurate, and consistent.

• Precise GO verification for external threads: Provides reliable pass/fail checks against the UNJC 1/4 x 20 standard, helping you make quick, confident quality decisions.
• Durable hardened steel construction: Built to resist wear and provide long service life in demanding shop environments.
• User-friendly, fast conformance checks: Ring design enables easy slipping over threads and rapid identification of conforming parts, reducing inspection time.

Used on the production floor or in the workshop, this gauge helps streamline quality control, reduce rework, and ensure consistent mating with fasteners across assemblies. With its robust construction and straightforward operation, you can trust it to deliver repeatable results day after day.