Which tool is used to secure skin panels after pilot holes have been drilled?

Clecos are specifically designed to temporarily hold skin panels in place after pilot holes have been drilled. They are spring-loaded fasteners that can be easily inserted and removed, making them ideal for securing two or more layers of material together during the assembly process. Their adjustable nature allows for accurate alignment of the skin panels, which is crucial for ensuring that the subsequent rivets or fasteners are placed correctly.

Using clecos helps maintain the integrity of the assembly until permanent fasteners are applied, allowing mechanics the flexibility to make adjustments. This temporary fastening method is a standard practice in aerospace assembly to ensure that all components are properly aligned and secure before the final assembly is completed.

Other tools mentioned, such as rivets, clamps, and brackets, do serve important functions in various stages of assembly but do not provide the same temporary securing capability that clecos offer during initial alignment and preparation for final fastening.