The JBO Thread Ring Gauge (GO) for Metric Coarse threads is a precision inspection tool designed to quickly verify external thread diameters on metric coarse fasteners and threaded components. Built for quality control across machining, assembly, and manufacturing environments, it helps ensure every part threads in correctly and meets the required specifications.

This left-hand design, sized for M2.5 x 0.45, pairs precise dimensions with durable construction to deliver reliable checks in demanding workshop conditions.

• Hardened steel construction: Built from hardened steel to deliver exceptional durability and wear resistance, helping the gauge stand up to daily workshop use.
• Precise GO gauge for external threads: Specifically engineered to quickly verify external thread diameters and confirm parts meet the required specifications, reducing rework and returns.
• Metric coarse compatibility (M2.5 x 0.45) with left-hand orientation: Designed for metric coarse thread standards, in a left-hand configuration to match your assemblies and maintain inspection accuracy.

When you rely on this JBO gauge, you gain confidence that every threaded joint will thread in smoothly, fit correctly, and perform as intended. The combination of precise dimensions and tough construction keeps inspections fast and repeatable, helping you maintain consistent quality across batches, minimize downtime, and streamline your QA workflow.