The JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M40 x 1.5 is a precision tool designed to streamline external thread inspection. Ideal for engineers, machinists, quality teams, and workshop technicians, it provides a clear go/no-go indication to verify that threaded parts meet the exact Metric Fine standard for left-handed threads.

Crafted from hardened steel for lasting performance, this GO ring resists wear in busy production environments while maintaining consistent accuracy. Its straightforward design delivers reliable feedback during routine checks of fasteners, housings, adapters, and other threaded components.

• Metric Fine GO designation: Quickly verify external thread diameters for M40 x 1.5 left-hand threads, delivering clear go/no-go results that reduce inspection time and rework.
• Hardened steel construction: Built to endure daily use in demanding workshop environments, maintaining accuracy and resisting wear to extend gauge life.
• Left-hand thread compatibility, 6g class: Specifically designed for left-handed threads with 6g tolerance, ensuring correct conformance checks and minimizing measurement errors.

With this gauge in your toolkit, you gain faster, more reliable thread inspections, consistent results across batches, and fewer defects passing QC. Its durable construction keeps measurement accuracy over time, helping you streamline quality control, reduce downtime, and uphold your manufacturing standards.