The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. It’s specifically configured for M39 x 2 right‑hand threads and the 6G tolerance class, making it ideal for validating threaded holes in mating components.

With a Go/No-Go design, it provides a quick pass/fail assessment of each threaded hole, helping teams verify fit and reduce rework during assembly or maintenance. The gauge’s hardened steel construction ensures long-lasting performance even in busy workshop environments.

• Go/No-Go design for quick inspection: Quickly determine whether a threaded hole meets the required tolerance, reducing inspection time and avoiding misfits in assembly.
• Metric fine-thread compatibility (M39 x 2): Specifically calibrated for M39 x 2 right-hand threads, ensuring precise hole validation and reliable mating.
• Hardened steel construction for durability: Built to resist wear and maintain accuracy through heavy use, extending tool life in workshops and production lines.

Using this gauge helps streamline quality control, minimize guesswork, and accelerate setup by confirming correct thread engagement quickly. Its robust construction and reliable performance translate into fewer returns, less downtime, and more consistent results across projects—from routine maintenance to high-volume production. With the JBO Thread Plug Gauge in your toolkit, you’ll gain confidence that every threaded hole will meet specifications on the first check.