Screws are fasteners that use their threaded shafts to provide their holding power and are designed to be affixed with screwdrivers. A few of the most common types of screws are below.
Fastener is a general term to describe something which is used as a restraint for holding things together or attaching to other things. The main physical distinction between screws and bolts is that screws are entirely full of threads while bolts contain shanks without threads.