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. Self-tapping screws are screws, as the name implies, that have the capacity to tap threads into the material. For all kinds of materials, including wood, metal, and stone, self-tapping screws are used.
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