The JBO Thread Ring Gauge (NoGo) – Metric Coarse – Right Hand – 6h – M3 x 0.5 is a precision external thread gauge designed for quick, reliable inspection of metric coarse threads. It helps machinists, inspectors, and buyers confirm that parts will mate correctly with standard fasteners by delivering a clear pass/fail result against the M3 x 0.5 thread profile and 6H class.

Constructed from hardened steel for long-lasting performance, this NoGo gauge resists wear in busy workshops and maintains accurate dimensions through repeated use. Its compact ring form makes it easy to handle, store, and incorporate into daily quality checks, ensuring consistent results across batches.

• Durable Hardened-Steel Construction: Built to withstand daily use in demanding environments, resisting wear to maintain accurate measurements over time.
• Metric Coarse Thread Verification (M3 x 0.5, 6H): Precisely checks external threads against the 6H tolerance to provide decisive Go/NoGo results, reducing guesswork and rework.
• Right-Hand, Easy-to-Use Ring Design: Specifically aligned for right-hand coarse threads and designed for quick handling and fast, repeatable checks in busy QC workflows.

By incorporating this gauge into your inspection routine, you gain faster, more consistent thread checks, reduce scrap due to misfit fasteners, and improve overall workflow in QC-heavy environments. The hardened-steel construction and Go/NoGo design deliver dependable results day after day, helping engineers, buyers, and shop-floor technicians trust every threaded connection they specify, source, or assemble.