Final answer:
A rivet is the fastener that reaches around both sides of a joint and is compressed to fill the hole, forming a head on each side to securely join materials together.
Step-by-step explanation:
In most cases, a rivet reaches around both sides of the joint and compresses the shank until it fills the hole and forms a head on both sides. Riveting is a technique often used in construction and manufacturing to join materials together without the use of welding or adhesives. Once the rivet is inserted into a pre-drilled hole, it's deformed by applying force to the tail, which causes it to expand, securing the materials in place.