The JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6h - M40 x 1 is a precision inspection tool designed to quickly and confidently verify external thread diameters. Built for engineers, machinists, quality inspectors, and shop-floor professionals, it provides a clear go-side check against the M40 x 1 thread standard.

Manufactured from hardened steel for exceptional durability, this ring gauge resists wear in demanding environments and maintains tight tolerances over many uses. The simple, intuitive design makes it easy to identify properly formed threads at a glance, helping you speed up quality control and ensure consistent results across parts.

• Accurate Go Gauge for External Threads: Quickly verify that the external thread diameter and pitch conform to the M40 x 1 standard, enabling fast go/no-go decisions and reducing rework.
• Hardened Steel Construction for Longevity: Built from hardened steel to resist wear and maintain tight tolerances even in high-use environments, delivering dependable results over time.
• Right-Hand, Metric Fine Design for Easy Verification: Specifically shaped for right-hand threads with fine pitch, making setup simple and inspections consistent across parts and operators. Includes 6h class alignment to support precise conforming checks.

Together, these features help streamline your quality control workflow, delivering reliable, repeatable thread verification that speeds assembly, reduces waste, and supports consistent performance across production runs. The JBO gauge provides confidence in every inspection, whether you’re verifying fasteners, fittings, or machined components that rely on precise M40 x 1 threads.