The JBO Thread Ring Gauge (NoGo) - Metric Fine is a precision inspection tool designed to verify external thread diameters on fasteners and threaded components. Built for professionals across manufacturing, machining, quality control, and workshop environments, this NoGo gauge provides fast, reliable checks for M55 x 1.5 metric fine threads.

Made from hardened steel, it resists wear and maintains accuracy through heavy use. Its right-hand orientation and 4h classification support consistent, easy-to-read checks, helping you quickly identify parts that do not meet specification and keep production moving.

• Fast Go/NoGo checks for quick decisions: Quickly determine if external thread diameters meet the M55 x 1.5 specification, reducing inspection time and rework by clearly flagging non-conforming parts.
• Hardened steel construction for long-lasting accuracy: Built to stand up to daily use in busy shops, resisting wear and maintaining precise measurements over time.
• Intuitive design with a datum marker for easy reads: Right-hand orientation, metric fine threading compatibility, and a visible red datum marker help you align and identify out-of-spec parts at a glance, speeding up QC workflows.

This gauge helps you achieve reliable, repeatable thread inspections across multiple jobs, cut downtime, improve throughput, and ensure produced parts meet required standards on first pass. Its durable build and straightforward operation make it a trusted addition to any quality control or precision engineering workflow.