The JBO Thread Ring Gauge (GO) for Metric Fine threads is a precision inspection tool designed to verify external thread diameters and pitch. It helps engineers, machinists, and quality teams quickly determine whether a threaded part meets the required M18 x 0.5 metric fine standard.

This left-hand variant is built from hardened steel for durability in busy workshops, delivering reliable go/no-go results even in demanding environments. Its design supports easy identification of conforming components and smooth integration into quality control workflows.

• Precise Metric Fine GO Gauge (M18 x 0.5, 6g): Quickly verify external thread diameter and pitch for metric fine threads, delivering reliable go/no-go results that keep production moving and reduce rework.
• Rugged Hardened Steel Construction: Built for years of service in busy workshops; resists wear, maintains accuracy, and provides long tool life even with repeated use.
• Left-Hand Thread Ready and Quick QC: Specifically configured for left-hand threads, simplifying alignment and speeding up inspection workflows so you confidently identify compliant parts.

Using the gauge reduces inspection time, improves accuracy, and helps ensure components fit first time, minimizing downtime and returns. The hardened steel construction stands up to daily use while the metric fine GO specification and left-hand orientation make it suitable for a wide range of applications, delivering consistent, reliable results that enhance overall production quality.