Generally refers to pointed, coarse toothed, hardwood screws, as well as aluminum alloy and plastic screws. A specialized self tapping screw used for tapping metal holes is called a tap.
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Self tapping screw is a type of screw with a drill bit, which is constructed using specialized electric tools to complete drilling, tapping, fixing, locking and other processes in one go. Self tapping screws are mainly used for connecting and fixing thin plates, such as the connection between color steel plates, the connection between color steel plates and purlins, wall beams, etc.
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