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  2. Self-tapping screw - Wikipedia

    en.wikipedia.org/wiki/Self-tapping_screw

    Self-tapping screws can be divided into two classes: [3] those that displace material (especially plastic and thin metal sheets) without removing it, known as "thread-forming" self-tapping screws, and self-tappers with sharp cutting surfaces that remove the material as they are inserted, termed "thread-cutting" self-tapping 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. Anchor bolt - Wikipedia

    en.wikipedia.org/wiki/Anchor_bolt

    Tapcon screws are a popular anchor that stands for self tapping (self threading) concrete screw. Larger diameter screws are referred to as LDT's. This type of fastener requires a pre-drilled hole—using a Tapcon drillbit—and are then screwed into the hole using a standard hex or phillips bit. These screws are often blue, white, or stainless ...

  5. Robertson screw - Wikipedia

    en.wikipedia.org/wiki/Robertson_screw

    Robertson screwdrivers are easy to use one-handed, because the tapered socket tends to retain the screw, even if it is shaken. [3]: 85–86 They also allow the use of angled screwdrivers and trim-head screws. The socket-headed Robertson screws are self-centering and reduce cam out. They also stop a power tool when set, and can be more easily ...

  6. Screw - Wikipedia

    en.wikipedia.org/wiki/Screw

    An electric driver screws a self-tapping phillips head screw into wood The hand tool used to drive in most screws is called a screwdriver . A power tool that does the same job is a power screwdriver ; power drills may also be used with screw-driving attachments.

  7. List of screw drives - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_drives

    Slot screw drives have a single horizontal indentation (the slot) in the fastener head and is driven by a "common blade" or flat-bladed screwdriver.This form was the first type of screw drive to be developed, and, for centuries, it was the simplest and cheapest to make because it can just be sawed or filed.

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