The JBO Thread Plug Gauge (GO) – Metric Fine is a precision inspection tool designed to verify threaded holes in metal parts and assemblies. It’s a reliable choice for machinists, quality-control teams, shop technicians, and hobbyists who need fast, confident go/no-go checks to confirm holes meet exact size and pitch requirements.

This GO gauge is configured for metric fine threads and corresponds to M45 x 2 with a 6H tolerance in a right-hand orientation. Crafted from hardened steel, it delivers durability and long-lasting performance in demanding workshop environments while preserving measurement accuracy over many uses.

• Fast, reliable hole verification: Quickly confirm threaded holes meet the M45 x 2, 6H right-hand metric fine thread specification with a simple GO check, speeding inspections and reducing guesswork in QC workflows.
• Durable hardened steel construction: Built to withstand daily workshop use, resisting wear to preserve accuracy across many measurements and long service life.
• Ergonomic knurled grip for secure handling: The textured body provides a firm grip and easy alignment, helping you achieve consistent results even in tight or cluttered workspaces.

Using the JBO GO Thread Plug Gauge simplifies your quality checks by delivering clear, repeatable results that support consistent thread quality across parts and batches. Its durable construction and precise metric fine sizing reduce rework and downtime, helping you move smoothly from inspection to assembly with confidence.