self-tapping screw

self-tapping screw

[′self ¦tap·iŋ ′skrü] (design engineering) A screw with a specially hardened thread that makes it possible for the screw to form its own internal thread in sheet metal and soft materials when driven into a hole. Also known as sheet-metal screw; tapping screw.

sheet-metal screw, tapping screw

sheet-metal screws A coarse-threaded, tapered screw with a slotted head for driving with a screwdriver; used for fastening sheet metal and other materials, without a tapped hole and without a nut.