The term 'Bolt Variety' can be solved by the word 'RIVET', which is a five-letter word. A RIVET is a type of fastener, typically made of metal, used to join two or more pieces of material together. It is inserted into pre-drilled holes and then deformed, either by hammering or with a special tool, to create a permanent connection. Rivets are commonly used in the construction of aircraft, ships, and other large structures.