JBO Thread Plug Gauge (NoGo) - Metric Fine is a precision inspection tool designed to verify threaded holes that use metric fine threads. It’s a go-to gauge for machinists, inspectors, and manufacturing engineers who need fast, reliable hole checks to confirm parts meet exact thread specifications.

Built for tough shop environments, this Right Hand gauge features 6H tolerance for M90 x 4 threads and is made from hardened steel to resist wear. Its compact NoGo end provides clear, repeatable results, helping you maintain consistent quality across batches.

• Hardened steel construction: Durable, wear‑resistant body that maintains accuracy over thousands of uses in busy workshops.
• Metric Fine compatibility (M90 x 4, 6H): Specifically sized for metric fine threads, delivering consistent go/no-go checks and reliable hole acceptance decisions.
• Right‑hand orientation and NoGo design: Easy to use in standard threading applications; the NoGo end lets you quickly confirm holes are within tolerance, reducing guesswork.

With the JBO Metric Fine NoGo gauge, you can speed up your quality checks without sacrificing accuracy. The hardened steel construction stands up to routine use in machining, inspection, and assembly environments, while the precise metric sizing ensures you’re validating the correct thread form every time. By enabling quick, clear go/no-go confirmations, it helps you reduce rework, minimize downtime, and ensure consistent, reliable threaded connections across your production line.