The JBO Thread Ring Gauge (GO) – Metric Fine, Left Hand, 6g, M55 x 1.5 is a precision inspection tool designed to verify external thread diameters on fasteners and threaded components. It’s ideal for quality teams, engineers, and workshop technicians across manufacturing, automotive, and industrial settings who need quick, reliable confirmation that parts meet exact size and pitch requirements.

Crafted from hardened steel, this GO gauge delivers exceptional durability and wear resistance, keeping its accuracy in demanding environments. The left-hand configuration and metric fine pitch ensure compatibility with your parts and streamline inspection workflows, helping you identify correctly threaded components at a glance.

• Precise GO verification for external threads: Quickly determine if a part’s external thread diameter and pitch meet the M55 x 1.5 specification to ensure proper mating and performance.
• Hardened steel construction for lasting accuracy: Built to resist wear in busy shops, preserving measurement integrity over many cycles and years of use.
• Left-hand, metric fine compatibility: Designed for left-handed threads with a fine metric pitch, delivering reliable inspections and reducing rework in specialized applications.

This gauge supports cleaner, faster quality checks, helping you maintain tight tolerances and consistent results across production runs. By providing a clear pass/fail indication for threaded components, it enhances workflow efficiency, minimizes downtime, and gives you confidence in every measurement.