Introducing the JBO Thread Ring Gauge (NoGo) for metric fine threads. This left-hand gauge is calibrated for M5 x 0.5 external threads in 6g tolerance, helping engineers, machinists, and quality teams quickly confirm whether a part’s threads conform to specification. Designed for reliable Go/NoGo inspection, it makes it easy to identify non-conforming components at a glance.

• Precise metric fine compatibility (M5 x 0.5, left-hand): Specifically calibrated to verify left-hand metric fine threads with 6g tolerance, enabling fast, confident NoGo checks that distinguish pass from fail parts.
• Durable hardened steel construction: Built to resist wear and maintain precision in busy workshop environments, delivering long service life and consistent measurements over time.
• Ergonomic grip and orientation marker: Knurled edge provides secure handling, while a visible marker aids quick alignment during testing, reducing inspection time even with gloves on.

This gauge supports a smooth, repeatable inspection workflow, helping you verify thread diameters accurately, minimize rework, and ensure reliable assemblies. With its robust build and precise calibration, it offers dependable performance across demanding manufacturing and quality-control environments.