screw

A cylindrical rod incised with one or more helical or advancing spiral threads, as a lead screw or worm screw.

The tapped collar or socket that receives this rod.

A metal pin with incised threads and a broad slotted head that can be driven as a fastener by turning with a screwdriver, especially.

A tapered and pointed wood screw.

A cylindrical and flat-tipped machine screw.