The JBO Thread Plug Gauge is a left‑hand, metric fine thread plug gauge built for precise hole inspection in M9 x 1 sizes. Designed for Go/No-Go testing, it lets machinists, inspectors, and shop teams quickly verify that threaded holes meet the required tolerance (6H) so components assemble cleanly and reliably every time.

• Go/No-Go inspection for quick checks: Enables fast pass/fail verification of M9 x 1 left‑hand threads, reducing inspection time and helping ensure consistent fits in production and repair workflows.
• Left‑Hand, metric fine thread precision: Precisely sized for left‑hand M9 x 1 threads to support accurate validation in reverse-threaded assemblies and critical fit scenarios.
• Hardened steel construction: Built for durability in busy environments, delivering long‑lasting wear resistance and stable accuracy over many uses.

This gauge supports reliable quality control and efficient assembly, helping you minimize downtime and rework while delivering consistent results across demanding applications. With its rugged construction and targeted threading accuracy, you can trust the JBO Thread Plug Gauge to verify hole threads to the M9 x 1 standard and maintain steady performance in your daily machining and inspection tasks.