The JBO Thread Ring Gauge (GO) – Metric Fine is a precision tool used to validate external thread diameters with confidence. Designed for metric fine threads, it helps inspectors, machinists, and quality teams quickly verify that threaded components meet the required size and standards.

This GO ring gauge is crafted to withstand demanding workshop environments. Made with hardened steel, it offers exceptional durability and wear resistance, ensuring reliable performance over long tool life and through heavy use.

• Hardened steel construction for durability: Built from hardened steel to provide exceptional wear resistance, delivering long-lasting performance in demanding workshop environments.
• Easy identification of conforming threads: The user-friendly GO design lets you quickly distinguish parts that meet the standard, speeding up inspections and reducing guesswork in quality control.
• Precise metric fine thread compatibility (M28 x 1, right-hand, 6e): Calibrated to exact metric fine threading specifications, ensuring accurate measurements and alignment with industry standards.

Using the JBO GO Ring Gauge streamlines your inspection workflow, helping you confirm thread quality fast, minimize downtime, and maintain consistent results across parts and batches. With its durable construction and precise sizing, you can rely on repeatable measurements and confident decisions during quality control and precision engineering projects.