The JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M3.5 x 0.35 is a precision inspection tool designed to verify external thread diameters on threaded components. Built specifically for metric fine thread geometries, this GO gauge provides a quick, reliable pass/fail check to ensure parts meet their required standards. Its left-hand orientation and 6g class specification make it ideal for shops that work with fine-pitch, left-handed threaded parts.

Suitable for engineers, machine shops, QC teams, and hobbyists, the gauge helps verify conformity efficiently during inspection, production, or assembly processes.

• Durable hardened steel construction: Built to withstand daily use in demanding environments, resisting wear to maintain accurate thread engagement over time.
• Metric Fine GO gauge for precise external thread checks: Quickly determine whether parts conform to M3.5 x 0.35 and related fine-pitch standards, supporting fast, reliable quality control.
• Left-hand, 6g class compatibility: Specifically designed for left-handed thread forms and 6g tolerance, ensuring accurate go/no-go results across suitable components.

By choosing this JBO gauge, you streamline inspection workflows, reduce rework and downtime, and achieve consistent thread quality across batches. The tool’s robust materials and straightforward GO indication help teams deliver reliable fittings and assemblies with confidence.