The JBO Thread Plug Gauge (NoGo) - Metric Fine - Left Hand - 6H - M56 x 1.5 is a precision inspection tool designed to verify metric fine threaded holes. Ideal for machinists, inspectors, manufacturers, and maintenance professionals, it helps you confirm hole size quickly and with confidence to keep parts within specification.

• Metric Fine precision for M56 x 1.5, 6H: Calibrated for metric fine threads, enabling accurate NoGo checks of threaded holes to the required 6H tolerance.
• Hardened steel construction: Built for durability and long tool life, delivering stable, repeatable measurements even in demanding workshop environments.
• Left-Hand orientation with knurled grip: Easy alignment with left‑hand threaded components and a secure, comfortable grip for fast, repeatable inspections.

Used correctly, this gauge helps you quickly confirm whether a hole is within spec, reducing guesswork and rework. Its durable construction maintains accuracy across many inspections, supporting efficient QA workflows. The left‑hand design and knurled grip speed up setup and improve handling in tight spaces, delivering reliable results for precision assemblies and routine maintenance alike.