The JBO Thread Ring Gauge (GO) – Metric Fine is a precision inspection tool for verifying external thread diameters on fasteners, shafts, and threaded components. Designed for engineers, machinists, inspectors, buyers, and hobbyists in manufacturing, automotive, and maintenance environments, it helps ensure parts conform to right-hand metric fine thread standards, specifically M142 x 2 with a 6g tolerance.

Constructed from hardened steel, this GO ring gauge delivers lasting durability and wear resistance in demanding shop settings. Its user-friendly GO design makes conformance checks fast and straightforward, so teams can identify compliant components at a glance and keep workflows moving.

• Precise GO Check for Metric Fine Threads: Quickly verify external thread diameters against the M142 x 2 metric fine standard and 6g tolerance, enabling fast pass/fail decisions and reducing rework.
• Durable Hardened Steel Construction: Built to withstand daily use in busy shops, resistant to wear, and maintains measurement accuracy over time.
• Fast, Clear Conformance Feedback: The GO gauge provides immediate go/no-go results, empowering inspectors and operators to streamline QC workflows and minimize downtime.

With the JBO Thread Ring Gauge (GO) – Metric Fine, you gain a reliable, repeatable method to confirm thread compatibility, minimize rework, and keep production moving. This gauge supports consistent thread quality from incoming parts to final assembly, making it a dependable addition to any shop floor, QA lab, or maintenance team handling metric fine threads.