The JBO Thread Ring Gauge (GO) for UNC 1" x 8 is a precision inspection tool designed to verify external thread diameters and pitch for right-hand, 1"-8 UNC threads. Built for professionals across manufacturing, quality control, and assembly, this GO gauge helps you quickly determine whether a threaded component conforms to the required size and spec, keeping your projects on track.

Crafted from hardened steel, this gauge delivers exceptional durability and wear resistance in demanding work environments. Its robust construction supports repeated GO checks over the life of the tool, while the compact, easy-to-handle design makes it suitable for busy benches, tool rooms, and production lines.

• 1" x 8 UNC GO Gauge (Right-Hand, 2A): Verifies external thread diameter and pitch for 1"-8 UNC threads; the GO portion provides a fast, reliable conformance check to speed up inspections and reduce rework.
• Hardened steel construction: Delivers long wear life and consistent accuracy, even with daily use in tough shop conditions.
• Simple, workflow-friendly design: Clear markings and a compact form that integrate smoothly with standard QC procedures and caliper setups for effortless checks.

Using this gauge helps you streamline quality control, shorten inspection times, and ensure reliable thread fit across parts and assemblies. Its durable build and precise design support repeatable results, boost confidence in returned parts, and keep production flowing with fewer delays.