The JBO Thread Ring Gauge GO for Metric Coarse (Left Hand) is a precision inspection tool designed to verify external threads quickly and accurately. It’s ideal for engineers, machinists, inspectors, and quality teams who need to confirm that M12 x 1.75 metric coarse threads meet exact specifications so assemblies fit reliably.

Crafted from hardened steel for durability and wear resistance, this GO ring gauge preserves its precise dimensions through repeated checks. Its left-hand configuration and 6g tolerance support fast, confident go/no-go checks in demanding production environments and align with industry standards.

• Hardened steel construction for durable, long-life use: Withstands daily inspection workloads and resists wear to maintain consistent measurements over time.
• Accurate GO verification for M12 x 1.75 metric coarse threads: Provides fast, reliable go/no-go checks to confirm parts meet spec, reducing rework and boosting QA efficiency.
• Left-hand orientation with 6g tolerance for reliable fit: Specifically tailored for common metric coarse threads, ensuring proper engagement and confident performance with minimal setup.

Whether you’re on a high-volume production line or a precision workshop, this gauge streamlines inspections, prevents out-of-spec parts from progressing, and helps you deliver consistent, reliable results that meet industry standards with confidence.