The JBO Thread Plug Gauge (GO) - Metric Fine - Right Hand - 6H - M42 x 1 is a precision inspection tool designed to quickly verify threaded holes for metric fasteners. It’s ideal for quality control teams, machine shops, and maintenance technicians who need reliable go/no-go checks to confirm hole readiness before assembly.

Built from hardened steel, this GO gauge delivers durable, long-lasting performance in demanding production environments. Its right-hand, metric-fine M42 x 1 design aligns with standard components, helping ensure consistent inspection results across shifts and batches.

• Precise M42 x 1 metric fine GO thread: Engineered to slide smoothly into compliant holes, delivering a clear pass reading that speeds up QC and reduces guesswork during setup.
• Hardened steel construction for wear resistance: Withstand repeated insertions and tough workshop conditions, preserving accuracy and extending tool life.
• Ergonomic, user-friendly design: Knurled body provides a secure grip and easy alignment, enabling fast checks even with gloves in busy workcells.

Using the JBO GO gauge helps ensure that every M42 x 1 threaded hole meets specification before assembly, reducing rework and downtime. The durable construction maintains calibration stability through daily use, while the straightforward GO reading supports consistent quality and faster inspection cycles across production runs.