Which fastener is often used in situations requiring disassembly and reassembly?

The machine screw is commonly used in situations where disassembly and reassembly are required because it features a threaded shaft that allows it to be easily inserted into a threaded hole or nut. This property enables quick fastening and unfastening, which is essential in applications where components may need to be taken apart for maintenance, repair, or modification.

In contrast, nails and rivets are typically permanent fasteners. Nails are driven into materials and generally cannot be easily removed without damaging the surrounding material. Rivets are used to create permanent joints by deforming one end after insertion, making them quite difficult to remove without cutting them out. Wood screws, while they can be removed and reused, may not be as versatile as machine screws in terms of application across different materials or precision assembly processes. Therefore, the characteristics of machine screws make them the ideal choice for applications where frequent assembly and disassembly are necessary.