What is a cleco?

A cleco is correctly identified as a fastener used in the aircraft assembly and repair processes. It serves a crucial purpose during the temporary fastening of metal sheets or components together. When assembling or repairing aircraft structures, clecos are inserted into drilled holes and hold the components in place while the final fastening methods, such as rivets or bolts, are done. This allows for adjustments to be made before permanent fastening, ensuring precision in alignments and fit.

Clecos are particularly beneficial because they are easy to install and remove, enabling technicians to quickly assess fit and alignment without committing to any permanent joins until all components are perfectly arranged. This temporary fixation is essential in aircraft repair and assembly, where accuracy is paramount for safety and performance.