The JBO Thread Ring Gauge (NoGo) — Metric Fine, Right Hand, 6e, M4 x 0.5 is a precision ring gauge used to verify external thread diameters. Designed for right-hand metric-fine threads, it provides fast, reliable checks for quality control and assembly, with hardened steel construction that resists wear in busy workshops and a clear gauging edge for quick pass/fail decisions.

• Instant Go/No-Go verification: Quickly confirms whether external threads meet the maximum tolerance, saving inspection time and reducing misfits.
• Hardened steel, wear-resistant construction: Built to withstand daily use in demanding environments, delivering consistent accuracy and longer service life.
• Metric fine compatibility (M4 x 0.5): Precisely sized for fine-pitch metric threads, ensuring reliable checks on small fasteners and precision components.

This gauge supports efficient, predictable quality control across manufacturing, assembly, and repair workflows. By providing clear pass/fail results on each part, it reduces downtime, minimizes rework, and helps you meet dimensional standards with confidence. Its durable materials and precise sizing mean you can depend on consistent performance job after job, from incoming inspections to in-process checks on tight tolerance assemblies.