The JBO Thread Plug Gauge is a precision tool designed for metric fine threads, specifically engineered for accurate hole threading verification. With a right-hand orientation and M20 x 1.5 size (6H tolerance), it uses a Go/No-Go design to quickly confirm whether a threaded hole meets the required standard.

Built to withstand daily use, this gauge features hardened steel for long-lasting wear resistance and consistent performance across inspection jobs—whether you’re in a shop, on the production line, or in a maintenance setting.

• Go/No-Go quick verification: Quickly determine if the hole's thread meets the standard using simple pass/fail checks, reducing inspection time and guesswork.
• Specifically for metric fine threads: Tailored to M20 x 1.5 with 6H tolerance, providing confident compatibility with components using this standard.
• Durable hardened steel construction: Built to resist wear and maintain accuracy in busy workshop environments, delivering dependable performance over time.

With the JBO Thread Plug Gauge, you gain fast, repeatable thread checks that streamline quality control and assembly. The Go/No-Go workflow reduces downtime, ensures proper fit, and helps you maintain consistent results across parts, improving overall throughput and confidence in every build.