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  2. Self-tapping screw - Wikipedia

    en.wikipedia.org/wiki/Self-tapping_screw

    A self-tapping screw is a screw that can tap its own hole as it is driven into the material. More narrowly, self-tapping is used only to describe a specific type of thread-cutting screw intended to produce a thread in relatively soft material or sheet materials, excluding wood screws .

  3. List of screw and bolt types - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_and_bolt_types

    self-tapping machine screw: A self-tapping machine screw is similar to a machine screw, except the lower part of the shank is designed to cut threads as the screw is driven into an untapped hole. The advantage of this screw type over a self-drilling screw is that, if the screw is reinstalled, new threads are not cut as the screw is driven. set bolt

  4. Screw - Wikipedia

    en.wikipedia.org/wiki/Screw

    A machine screw or bolt is usually a smaller fastener (less than 1 ⁄ 4 inch (6.35 mm) in diameter) threaded the entire length of its shank that usually has a recessed drive type (slotted, Phillips, etc.), usually intended to screw into a pre-formed thread, either a nut or a threaded (tapped) hole, unlike a wood or self-tapping screw. Machine ...

  5. Category:Screws - Wikipedia

    en.wikipedia.org/wiki/Category:Screws

    Self-forming thread; Self-tapping screw; Set screw; Square thread form; T. Tap and die; Thread angle; List of thread standards; Thread-locking fluid; Torque ...

  6. Tap and die - Wikipedia

    en.wikipedia.org/wiki/Tap_and_die

    Tapping may either be achieved by a hand tapping by using a set of taps (first tap, second tap & final (finish) tap) or using a machine to do the tapping, such as a lathe, radial drilling machine, bench type drill machine, pillar type drill machine, vertical milling machines, HMCs, VMCs. Machine tapping is faster, and generally more accurate ...

  7. Pocket-hole joinery - Wikipedia

    en.wikipedia.org/wiki/Pocket-hole_joinery

    Pocket screws have a wide washer head to spread the load for a firm bond, and prevent screwing too far into the joint and cracking the wood. The self tapping screws will grip any type of wood, but coarse threads are needed for softer wood and fine threads are needed for harder. [5]

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