The JBO Thread Plug Gauge is a precision Go/No-Go tool designed for metric fine threads. It’s ideal for engineers, machinists, inspectors, and shop personnel who need fast, confident hole-thread checks.

This right-hand gauge is sized M9 x 0.75 with 4H tolerance and features hardened steel construction for long-lasting performance.

• Go/No-Go Quick Validation: Quickly verify hole threads with a single gauge that provides both acceptance and rejection checks, reducing inspection time and avoiding guesswork in assemblies.
• Metric Fine Thread (M9 x 0.75) Precision: Specifically calibrated for fine metric threads to ensure accurate fit checks and prevent mismatches in critical components.
• Durable Hardened Steel, Right-Hand, 4H Tolerance: Built for longevity and repeatable results, with a right-hand configuration that matches standard practice and a tight 4H tolerance for consistent measurements.

Using the JBO Thread Plug Gauge helps you speed up quality checks, prevent misfits, and keep assemblies moving smoothly. The Go/No-Go design delivers reliable, repeatable results across routine inspections, while the hardened steel construction stands up to daily use in demanding environments. With its precise metric fine-thread sizing and robust build, you can trust consistent performance from part to part and across multiple projects.