JBO Thread Plug Gauge is a precision tool designed for metric fine threads, ideal for engineers, machinists, quality teams, and workshop professionals who need fast, reliable hole sizing. The right-hand, 6G gauge with M16 x 1.25 pitch uses a Go/No-Go design to speed inspections and help ensure components fit together with confidence.

• Go/No-Go quick checks: Instantly verify whether the hole is within tolerance, speeding inspections and reducing guesswork during assembly.
• Durable hardened steel construction: Built to withstand frequent use in busy workshops, resisting wear while maintaining long‑term accuracy.
• Metric fine-thread compatibility (M16 x 1.25, 6G, right-hand): Precisely calibrated for metric fine threads, ensuring reliable fit and repeatable results across parts and assemblies.

Designed for reliable quality control and efficient assembly, this gauge helps you reduce rework, shorten setup times, and improve consistency across projects. The rugged, hardened steel body thrives in demanding shop environments, while the Go/No-Go functionality delivers clear, repeatable results with every check.