The JBO Thread Ring Gauge GO - Metric Fine is a precision tool designed to quickly verify external thread diameters for metric fine threads. It helps quality teams, machine shops, and engineering labs confirm that threaded components meet exact standards before assembly or shipment.

Crafted from hardened steel for durability, this GO ring gauge resists wear in busy production environments and maintains stable performance over time. Its right-hand orientation, metric fine specification, 6h class, and M4 x 0.25 size ensure it matches common industry standards and provides clear, reliable pass/fail readings during inspection.

• Fast Go/No-Go verification: Quickly confirm whether external thread diameters meet tolerance, reducing inspection time and keeping production moving smoothly.
• Rugged hardened steel construction: Built to withstand daily use, providing long service life and consistent results in demanding workshops and QA labs.
• Metric Fine, right-hand, 6H calibration: Precisely tailored for M4 x 0.25 external threads in a right-hand configuration, delivering accurate, repeatable measurements aligned with standard components.

This gauge simplifies your quality workflow by delivering clear, dependable measurements that support faster decisions, fewer reworks, and more consistent part quality across batches. With its robust construction and precise calibration, you can trust every measurement for incoming inspection, in-process checks, and final QC, making it easier to meet tight tolerances and keep projects on schedule.