The JBO Thread Ring Gauge (GO) - Metric Fine is a precision go gauge designed to verify external thread diameters on metric fine-threaded parts. Specifically sized for right-hand M42 x 1.5 threads, it supports engineers, machinists, inspectors, and hobbyists in quickly confirming conformance during in-process checks and final quality assessments.

Crafted from hardened steel, this gauge resists wear and maintains accuracy in demanding workshop environments. The ring’s knurled outer edge provides a secure grip for fast, confident testing, even when wearing gloves.

• Fast GO conformance checks: Quickly determine whether a threaded component meets the M42 x 1.5 right-hand specification to speed up inspections and reduce guesswork.
• Durable hardened steel construction: Built to withstand daily use in busy shops, delivering long-lasting reliability and consistent measurements.
• Ergonomic, easy-to-handle design: Knurled edge and straightforward form offer a secure grip and simple, repeatable testing in real-world conditions.

In everyday production and quality control, this GO gauge helps you confirm thread conformity with clarity and confidence, enabling smoother workflows, fewer reworks, and dependable results across inspections and assembly processes.