When inspecting clinch thickness with a Go/NoGo gauge, if the top of the driven head does not stick above the top of the gauge, how is the clinch thickness rated?

In the context of using a Go/NoGo gauge for inspecting clinch thickness, the key function of the gauge is to determine whether the clinch is within specified tolerances. A proper clinch will have the driven head protrude above the gauge, indicating that the necessary thickness is met. If the top of the driven head does not rise above the top of the gauge, it suggests that the clinch is below the required thickness threshold.

This indicates that it does not provide the necessary mechanical properties that are crucial for the assembly integrity, such as strength and load-bearing capacity. Therefore, it is rated as not acceptable. Ensuring that clinch thickness is compliant with specifications is critical for the safety and effectiveness of aerospace assemblies, making adherence to these measurements paramount in aerospace manufacturing and assembly practices.