The JBO Thread Plug Gauge is a precision tool designed for metric fine threads, built to help technicians, engineers, and buyers verify threaded holes with confidence. It’s ideal for applications where precise threading matters, ensuring components assemble cleanly and consistently.

This Right Hand gauge in the M17 x 0.5 size employs a Go/No-Go design for fast, reliable hole inspection. Crafted to accommodate metric fine threads and sized to the 6H class, it delivers repeatable checks in busy workshops, while its hardened steel construction stands up to daily use and wear.

• Go/No-Go quick checks: instantly determine whether a threaded hole is within spec, speeding up inspections and reducing guesswork during assembly.
• Hardened steel for durability: built to resist wear and maintain accuracy through heavy, repeated use in demanding environments.
• Ergonomic knurled grip: the textured handle provides secure, comfortable handling for precise placement and easier measurement checks.

Whether performing incoming quality checks, in-process verification, or final assembly, this plug gauge helps you verify fit with clarity and speed. It supports consistent results across parts, lowers downtime, and gives teams the confidence to move projects forward efficiently.