The JBO Thread Plug Gauge (NoGo) is a precision measuring tool designed to verify threaded holes with metric fine threads. It’s an essential instrument for engineers, inspectors, machinists, and shop staff who need fast, dependable checks to confirm parts meet specification.

Made from hardened steel for durability, this gauge delivers wear resistance and long service life in demanding environments. The NoGo design targets metric fine threads on a right-hand hole—M75 x 3 with 6H tolerance—allowing quick, confident pass/fail decisions during quality checks.

• Fast Go/No-Go verification for metric fine threads: Quickly determine if the hole meets the M75 x 3, 6H spec, reducing inspection time and helping prevent misfits.
• Durable hardened steel construction: Built to withstand daily use, resisting wear so readings stay reliable over many inspections.
• Right-Hand threading and precise sizing: Specifically designed for common metric fine holes with right-hand orientation, ensuring consistent fits and repeatable checks in routine QC tasks.

This gauge helps streamline workflow, minimize rework, and support consistent quality across production runs. With its rugged build and clear NoGo indication, you can trust each inspection to guide assembly decisions and maintain process reliability.