The JBO Thread Plug Gauge (GO) is a precision inspection tool designed to verify threaded holes to metric fine standards. It is ideal for engineers, machinists, quality inspectors, and workshop technicians who need reliable hole verification for M140 x 4 threads and 6H tolerance. Built from hardened steel for lasting performance, the GO gauge features a knurled body for secure handling and a compact form that fits easily into a tool kit. It supports quick, accurate identification of properly threaded holes during assembly, inspection, and maintenance.

• Exact M140 x 4 metric fine size: Precisely sized GO gauge matches the M140 x 4 thread specification, enabling accurate hole verification within the 6H tolerance.
• Hardened steel construction for durability: Designed to resist wear and abuse in busy shop environments, delivering long-lasting accuracy and repeatable measurements.
• Ergonomic knurled grip for fast, reliable checks: Textured surface and compact form provide a secure grip for quick insertion and removal, reducing inspection time and errors.

Using the JBO Thread Plug Gauge (GO) helps streamline quality checks by giving fast, confident pass/fail determinations for threaded holes, minimizing guesswork and rework. The durable construction keeps its accuracy over thousands of insertions, ensuring consistent results across production runs and maintenance tasks. This gauge is a practical, reliable addition to any QC toolkit, supporting precise assembly and documented compliance with metric fine thread standards.