The JBO Thread Plug Gauge (NoGo) is a precision instrument designed to verify metric fine-threaded holes with exacting reliability. Specifically sized for the M80 x 4 fine-thread specification and offered in a Right Hand orientation with 6H tolerance, this NoGo gauge helps ensure every hole meets the required standard before you move to assembly or production.

Built for demanding shop environments, the gauge features a hardened steel construction for long-lasting performance and calibrated accuracy. Its knurled grip provides a secure, comfortable hold for quick, repeatable checks on the bench or in the machine shop. The compact form makes it easy to carry between workstations, toolrooms, and maintenance areas.

• Accurate metric fine-thread validation: Quickly confirm hole size and thread fit to the M80 x 4 fine-thread standard, reducing guesswork and preventing rework in QC and assembly.
• Rugged hardened steel construction: Built to withstand daily use, resist wear, and maintain calibration for reliable inspections over time.
• Ergonomic NoGo gauge design for fast QC: Right-hand orientation with a knurled grip enables fast, repeatable checks and minimizes downtime during inspection workflows.

This gauge helps you streamline quality control, protect fit and function in assemblies, and sustain consistent results across production runs. With its durable construction and straightforward operation, you can trust it to deliver reliable hole verification day after day.