The JBO Thread Plug Gauge is a precision Go/No-Go tool designed for metric fine threads. It helps machinists, inspectors, and assembly teams quickly verify threaded holes so parts fit together accurately and consistently.

Built with hardened steel and configured specifically for Right Hand M9 x 1 fine threads in 6G class, this gauge is built to endure repeated use in busy workshops while maintaining reliable performance.

• Go/No-Go design for fast, confident checks: Quickly determine whether a threaded hole meets spec, reducing guesswork and rework in production and assembly.
• Hardened steel for lifelong reliability: Designed to resist wear from repeated insertions, delivering lasting accuracy in demanding shop environments.
• Specifically tuned for M9 x 1, Right-Hand, 6G: Tailored to the exact metric fine-thread standard, ensuring consistent, repeatable inspections of mating parts.

This plug gauge helps streamline quality control, speed up setup, and minimize downtime by delivering clear, reliable threading checks. With its durable construction and precise tuning for metric fine threads, it supports consistent results across jobs, improving workflow and finished-part quality.