The JBO Thread Ring Gauge (NoGo) — Metric Fine, Left Hand, 6g, M3 x 0.35 — is a precision instrument used to verify external thread diameters on fasteners and machined parts. It serves professionals across manufacturing, assembly, and inspection, ensuring components meet essential size and tolerance standards.

Made from hardened steel, this ring gauge delivers durability and wear resistance for busy workshops. Its straightforward design makes it easy to spot non-conforming threads at a glance, supporting efficient quality control and repeatable, accurate results.

• Fast Go/No-Go verification: Quickly confirms whether external threads meet the specified size, speeding up inspections and reducing guesswork.
• Durable hardened steel build: Withstands daily use in demanding environments, delivering long tool life and consistent performance over time.
• Left-hand Metric Fine compatibility (M3 x 0.35, 6g): Specifically designed for left-handed threads with a metric fine pitch, ensuring correct engagement and reliable measurements for specialized applications.

Using the gauge supports efficient quality control and precise engineering workflows, helping you identify non-conforming parts early, reduce downtime, and maintain tight tolerances across production runs. It’s a dependable, straightforward tool that boosts confidence in your measurements and your final assemblies.