The JBO Thread Plug Gauge is a precision tool designed for inspecting metric fine-thread holes with confidence. Built for right-hand M18 x 1.5 threads and 6G class tolerances, it helps machinists, inspectors, and assembly teams verify fit quickly and consistently. This Go/No-Go gauge is ideal on the shop floor or at quality control stations where precise thread validation matters.

• Go/No-Go design for fast verification: Quickly determine hole tolerance by confirming the Go side threads in smoothly while the No-Go side prevents insertion beyond tolerance, reducing guesswork and downtime.
• Size-specific for M18 x 1.5 metric fine threads (6G, Right-Hand): Precisely matched to common fine-thread specifications, enabling accurate hole validation and consistent part mating.
• Hardened steel construction for long life: Built to resist wear and maintain accuracy under daily use, ensuring reliable performance across many inspections.

This gauge streamlines threading inspections, helping you speed up setup and reduce rework. By delivering clear go/no-go results, it supports tighter process control and more consistent thread quality across assemblies, ultimately saving time and enhancing overall manufacturing reliability.