The JBO Thread Plug Gauge is a precision inspection tool designed for metric coarse threads. This right-hand, go/no-go gauge checks threaded holes for M2 x 0.4 specifications, delivering a quick, definitive pass/fail that keeps production moving and assemblies accurate.

Built to withstand the demands of busy shops, the gauge is made from hardened steel for durability and long service life. It’s an essential instrument for quality control, machining, and field service, providing reliable checks so you can trust every hole you measure.

• Go/No-Go quick verification: Quickly determine if a threaded hole meets the M2 x 0.4 coarse thread standard with a simple pass/fail check, reducing inspection time and guesswork.
• Metric coarse thread specificity: Designed specifically for metric coarse threads (M2 x 0.4), ensuring accurate checks and consistent results across parts and assemblies.
• Hardened steel durability: Built to withstand daily shop use, delivering long service life and repeatable measurements even in demanding environments.

This gauge helps streamline quality control by delivering clear, repeatable results, reducing downtime, and enabling faster, more confident decisions about part fitment. Whether you’re in precision manufacturing, repair, or field service, it provides dependable checks that support overall accuracy and performance throughout your workflow.