The JBO Thread Ring Gauge (NoGo) - Metric Coarse is a precision inspection tool designed to verify external thread diameters on metric coarse threads. It’s ideal for engineers, machinists, quality inspectors, and maintenance teams who need fast, reliable checks to confirm parts meet standard dimensions such as M18 x 2.5.

Built for durability in demanding environments, this NoGo gauge uses hardened steel to resist wear and deliver long service life. Its right‑hand configuration and 6e sizing align with common coarse-thread specifications, delivering consistent, easy-to-interpret results without guesswork.

• Accurate NoGo verification for metric coarse threads: Quickly identify non-conforming external threads (such as M18 x 2.5) to prevent mismatches in assembly, reducing downtime and rework.
• Durable hardened steel construction: Designed to withstand daily use, resist wear, and maintain precise dimensions through numerous inspections.
• Right-hand 6e, M18 x 2.5 compatibility: Matches the standard external thread form and size, enabling reliable, repeatable gauge checks in standard manufacturing workflows.

This gauge supports clean, confident quality control processes, helping you speed up inspections, standardize measurements across teams, and ensure metric coarse threaded connections perform as intended in your assemblies.