A good selection of Aluminium rivets and Rivet Guns both plier type and lazy tong versions. 

Rivets offer several advantages over threaded bolts. They won't loosen when subjected to vibration and can secure 2 or more pieces of thin material such as aluminium or steel sheets together. 

Widely used in applications where light weight and high strength are critical, such as in aircraft and vehicle bodywork, and building cladding and guttering installation instead of welding which can distort thin sheet material.