The JBO Thread Ring Gauge (GO) for UNF, Right Hand, 3A, 1/2 x 20 is a precision inspection tool designed to quickly verify external thread diameters and conformity to UNF standards. Suitable for engineers, machinists, quality teams, and maintenance professionals, it streamlines the process of confirming that threaded components meet exact size and tolerance requirements.

Constructed from hardened steel, this GO thread ring gauge delivers durable, long-lasting performance in demanding shop floors and QC benches. The ring’s design includes a knurled outer edge for secure handling, helping inspectors align and verify threads with confidence, even after extended use.

• Precise GO measurement for UNF 1/2 x 20: quickly confirm that external UNF threads meet 3A class standards with a single pass, speeding up inspection and reducing guesswork.
• Hardened steel construction: built to resist wear and maintain dimensional accuracy over time, ensuring reliable results in everyday use.
• Easy pass/fail usability: designed for straightforward identification of conforming components, helping to keep production and quality workflows moving smoothly.

This gauge supports efficient quality control by providing a clear, repeatable method to validate thread integrity. By using the GO gauge, you gain confidence that threaded parts will assemble correctly, meet specifications, and perform as intended in the final product.