The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. It helps machinists, inspectors, and shop floor teams quickly verify threaded holes, ensuring components fit together with confidence.

Sized for M17 x 1 right-hand 4H fine-thread holes, this Go/No-Go gauge delivers fast, reliable acceptance checks without guesswork—streamlining setup and reducing trial-and-error fits in production.

• Go/No-Go quick checks: The dual-function design lets you confirm a proper fit at a glance, speeding inspections and cutting downtime by avoiding unnecessary assembly attempts.
• Specifically matched to M17 x 1 right-hand 4H: Precisely aligned with the target thread size and orientation to ensure accurate control in metric fine-thread projects.
• Hardened steel for durability: Built to endure daily use, resist wear, and maintain consistent performance across long service life.

In daily workflows, the JBO Thread Plug Gauge helps you verify hole quality before assembly, reduce rework, and maintain tight tolerances across parts. Its robust construction and clear go/no-go signaling provide dependable results, making it a trusted tool for engineers, shop technicians, and quality teams alike.