The JBO Thread Plug Gauge is a precision inspection tool designed for anyone who works with metric fine threads—engineers, machinists, inspectors, and workshop professionals. Its Go/No-Go design lets you quickly verify whether a threaded hole will accept or reject a part, helping you keep assemblies exact and reduce misfits in production. Sized for M12 x 0.5 right-hand threads, this gauge is built to withstand daily use. Its hardened steel construction delivers long-lasting wear resistance, so you can rely on consistent performance in busy shop environments.

• Go/No-Go Quick-Check: Quickly determine if a threaded hole is within tolerance, speeding up quality checks and reducing guesswork during assembly.
• Right-Hand, M12 x 0.5 Fine Thread Compatibility: Precisely tuned for common metric fine threads and right-hand screws, ensuring accurate, repeatable results.
• Durable Hardened Steel Construction: Built for longevity, resisting wear and maintaining accuracy despite frequent use and handling.

This gauge helps you streamline inspection workflows, minimizes rework from out-of-tolerance holes, and supports consistent fit and performance across parts and assemblies. With reliable hardness and a straightforward Go/No-Go process, you can rely on precise checks that keep your production moving smoothly and your results repeatable.