The JBO Thread Plug Gauge (NoGo) – Metric Fine – Right Hand – 4H – M42 x 2 is a precision measuring tool designed to verify metric fine threaded holes with clarity and speed. It’s ideal for engineers, machinists, quality inspectors, and workshop teams who need reliable go/no-go checks to confirm hole size and thread accuracy.

Made from hardened steel for lasting durability, this NoGo gauge is built to withstand demanding environments and high-frequency inspections. The metric-fine design targets M42 x 2 threads, helping you ensure threaded holes meet exact standards and reduce misfits and rework in production or assembly lines.

• Metric Fine thread compatibility: Precisely calibrated for M42 x 2 metric fine threads, enabling quick, decisive pass/fail checks to verify hole size and thread quality.
• Durable hardened steel construction: Rugged, wear‑resistant materials deliver long tool life and dependable performance in busy shop environments.
• Ergonomic, user‑friendly design: Knurled body and compact form provide easy grip, straightforward alignment, and fast insertion/removal for efficient inspections.

This gauge helps you streamline quality control, speed up accurate hole inspection, and maintain consistent results across jobs. By delivering clear go/no-go feedback, it supports precise assemblies, reduces downtime, and gives you confidence that every threaded hole meets your exacting specifications.