The JBO Thread Ring Gauge (NoGo) – Metric Coarse – Left Hand – 6g – M48 x 5 is a precision tool designed to verify external thread diameters against exact standards. It’s ideal for quality control teams, machinists, inspectors, and engineers who need fast, reliable checks of metric coarse threads in metalworking, manufacturing, and assembly environments.

Crafted from hardened steel, this gauge is built to withstand daily use and resist wear, keeping measurements accurate over time. Its NoGo designation enables quick identification of nonconforming parts, supporting consistent fitment and reducing rework. The metric coarse specification (M48 x 5) with left-hand orientation ensures it matches the parts you service and integrates smoothly into routine inspections.

• NoGo Quick-Check for Metric Coarse Threads: Quickly determine if a component’s external thread diameter fails the NoGo limit, enabling fast pass/fail decisions and speeding up inspections.
• Rugged Hardened Steel Construction with Knurled Edge: Designed for durability in busy workshops, the hardened steel maintains dimensional stability, while the knurled outer edge provides a secure grip for precise alignment during checks.
• Left-Hand, M48 x 5 Coarse Thread Compatibility: Specifically engineered for left-hand coarse threads within the M48 x 5 range, ensuring accurate measurements and reducing reading errors in QC checks.

Used in quality control and production environments, this NoGo ring gauge helps you quickly confirm that external threads meet the M48 x 5 left-hand coarse specification, reducing downtime and rework. Its durable construction, clear NoGo threshold, and ergonomic design deliver consistent results and streamline inspections across projects.