The JBO Thread Plug Gauge is a precision inspection tool designed for metric coarse threads. It’s ideal for engineers, machinists, buyers, and maintenance teams who need fast, reliable checks to confirm threaded holes will accept the right components before assembly.

With a straightforward Go/No-Go design, this gauge makes it easy to verify hole size and tolerance at a glance, helping you reduce guesswork, prevent misfits, and speed up quality checks in any workshop or production line.

• Go/No-Go inspection for fast, reliable checks: Quickly determine if a threaded hole meets spec by using the go and no-go ends, reducing inspection time and preventing incorrect fittings.
• Durable hardened steel construction: Built to withstand rigorous use in busy environments, delivering long-lasting accuracy and dependable performance over time.
• Ergonomic knurled body for easy handling: The textured grip provides secure handling and precise control, even in tight spaces or when wearing gloves.

This plug gauge helps you confirm correct thread fitment, speeds up inspections, and improves workflow consistency. By delivering reliable, repeatable results for metric coarse threads, it minimizes downtime and supports quality across parts and assemblies.