The JBO Thread Ring Gauge (GO) — Metric Fine, Right Hand, 4h — M9 x 1 is a precision external thread gauge designed to help you confirm whether threaded components meet exact size and tolerance requirements. Ideal for engineering teams, machine shops, inspectors, and quality departments, it enables quick, reliable verification during production, assembly, and maintenance tasks.

Crafted from hardened steel for lasting durability, this GO gauge is built to withstand daily use in busy work environments while maintaining accurate measurements. Its straightforward design makes it easy to identify properly conforming parts at a glance, helping you reduce inspection time, minimize rework, and maintain consistent quality across assemblies.

• Go gauge for fast, confident acceptance: Quickly verify that an external thread meets the M9 x 1, 4h tolerance with a simple plug-and-match check, reducing inspection time and guesswork.
• Hardened steel construction for long life: Built to resist wear and damage in busy workshops, ensuring consistent performance over many inspections.
• Metric fine, right-hand M9 x 1 compatibility: Designed to match standard metric fine threads, so your parts pass only when they meet the exact size and thread form required.

Using the JBO Thread Ring Gauge (GO) helps streamline quality control by providing reliable, repeatable results for external threads. It supports faster inspections, reduces rework, and improves overall manufacturing reliability. Whether calibrating a machine, inspecting components for assembly, or validating supplier parts, this gauge delivers consistent performance with minimal training.