The JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M138 x 1.5 is a precision tool designed for quick, reliable inspection of external thread diameters. Ideal for inspectors, machinists, and assembly teams, it provides a clear GO reference to confirm that threads meet the required standards for your parts and processes.

Crafted from hardened steel for exceptional durability, this GO gauge delivers long-lasting performance in demanding workshop environments. Its right-hand orientation and metric fine configuration are tailored to common external thread applications, helping technicians perform consistent, repeatable checks with confidence.

• Go gauge for precise external-thread checks: quickly verify that a component’s outer thread matches the GO limit, enabling fast pass/fail decisions and reducing rework.
• Hardened steel construction: offers superior wear resistance and durability for reliable service through heavy use and daily inspections.
• Right-hand metric fine sizing (M138 x 1.5): designed to match fine-pitch metric threads with a right-hand orientation, ensuring accurate, standards-aligned measurements.

Used correctly, the gauge streamlines quality control, shortens inspection times, and supports consistent thread compatibility across batches. Its robust build minimizes downtime from wear, while the precise GO specification helps maintain reliable results in manufacturing, machining, and assembly workflows.