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(Screw Tap), a tool for cutting a screw thread in a previously drilled hole. A tap is a cylindrical spindle with cutting edges at one end. The other end, or shank, is designed to be fastened in a chuck or held in a tap wrench while being turned.
The main types of taps are manual taps; inside taps, for cutting a complete thread in through holes in one traverse; machine taps, for cutting threads mainly in blind holes on drilling machines, automatic machines, and special assembly-line units; machine-tool taps, for making threads in through holes on nut-tapping machines; grooveless taps, for cutting threads in through holes in one traverse; automatic taps, for cutting threads in nuts on automatic nut-tapping machines; and die and master taps, for cutting threads and thread gauges and removing the burrs in the threaded holes of circular dies. The materials used to make taps are alloy tool steel and high-speed steel.
tap(1) In communications, a connecting point on a line. For example, a wire tap is where a recording device is attached to a telephone line. See transceiver and bridged tap.
(2) (Amazon TAP) An Amazon Echo device. See Amazon Echo.
(3) To lightly touch a touch-sensitive screen. See double tap for more details.
(4) To press a key on a keypad.
(6) (TAP) (Telocator Alphanumeric Input Protocol) A protocol for transmitting text to a pager. Developed in the early 1980s, TAP was known as the Motorola Page Entry (PET) and IXO protocols and was adopted by Telocator, which later became the Personal Communications Industry Association (PCIA),
(5) To place a chip-based credit card near a terminal. See NFC and EMV.
|The Chip Card Logo|
|This payment terminal screen shows a credit card being tapped to make a payment via NFC contactless communications.|