The JBO Thread Ring Gauge (NoGo) – Metric Coarse is a precision inspection tool designed for quality control teams, machinists, and workshop staff handling metric coarse threads. Sized for M30 x 3.5, right-hand threads with a 4H tolerance class, this NoGo gauge provides a clear, quick reference to confirm external threads meet the required limits. Forged from hardened steel, it delivers lasting durability and wear resistance in busy environments while making it easy to identify non-conforming parts at a glance.

• Accurate NoGo limit verification: Quickly confirms whether external threads exceed the NoGo limit, speeding up quality checks and reducing ambiguous measurements.
• Durable hardened steel construction: Built to resist wear and maintain precise dimensions even in high-use workshops and production floors.
• Fast, user-friendly inspections: Designed for straightforward handling and reliable readings, helping you keep inspection times short and results consistent.

With the JBO NoGo Thread Ring Gauge, you gain a dependable, repeatable check that supports tight quality control, reduces rework, and ensures metric coarse threaded connections meet required standards for proper fit and function across assemblies.