Body skin panels on the tractor cab, buses, and some trailers are fastened using aluminum alloy or mild steel rivets. A rivet is a clamping type of fastening device. It must have two heads to clamp the material together. One head is preformed by the manufacturer and is referred to as the manufactured head. The other end of the rivet is formed after the rivet has been driven through the material to be clamped. This head is referred to as the bucked head and is shaped when driven against a bucking bar.

Although truck cabs are usually repaired by a body shop, truck trailer repair technicians are often required to become expert riveters. For this reason rivet removal, replacement, and repair practices are covered in some detail in Chapter 33 of this book.

Recommended reading: what is a drive axle