The JBO Thread Ring Gauge (NoGo) - Metric Fine is a precision tool engineered to validate external thread diameters on fasteners, fittings, and mating components. Designed for Right Hand threads with a 4h tolerance and an M50 x 1 pitch, it helps engineers, machinists, and quality teams quickly confirm parts meet exact metric standards during manufacturing, repair, or maintenance.

Crafted from hardened steel, this gauge offers lasting durability and wear resistance suitable for busy workshops. Its user-friendly, NoGo design makes it easy to identify non-conforming threads at a glance, supporting efficient quality control and precise engineering work.

• Precise metric fine thread verification: Designed for M50 x 1 external threads, enabling quick and reliable pass/fail decisions during QC inspections.
• Hard-wearing hardened steel construction: Built to resist wear and maintain accuracy through frequent use in demanding environments.
• User-friendly at-a-glance identification: Clear geometry and handling ease help operators promptly identify out‑of‑spec threads, reducing inspection time and downtime.

Using this gauge streamlines your threading inspections, improves consistency across assemblies, and supports faster, more confident quality decisions in production and maintenance work.