The JBO Thread Ring Gauge (GO) - Metric Fine is a precision tool designed to verify external threads on metric components. It is tailored for right-hand threads at M21 x 1 with a 6h class, enabling quick conformance checks and consistent QA across manufacturing and machining environments.

Crafted from hardened steel, this GO ring gauge delivers lasting durability and wear resistance in busy workshops. Its straightforward design helps inspectors and technicians quickly determine whether threads meet the required standards, reducing guesswork and rework.

• Precise Metric Fine GO design (M21 x 1, Right Hand, 6h): enables fast, pass/fail verification of external threads, supporting reliable quality control across parts and batches.
• Hardened steel construction: resists wear and deformation, extending tool life in demanding environments and preserving measurement accuracy over time.
• User-friendly inspection aid: provides clear, intuitive indication of conforming threads, helping operators speed up inspections and maintain consistent results.

Use this gauge to streamline thread inspections, improve workflow efficiency, and ensure consistent thread quality in manufacturing, machining, and assembly environments. Its durable build and precise GO design help reduce downtime, minimize rejects, and support reliable, repeatable results in everyday use.