Self tapping screw is a type of screw with a drill bit, which is constructed using specialized electric tools to drill, tap, fix, and lock in one go. Self tapping screws are mainly used for the connection and fixation of some thinner parts, such as the connection between color steel plates, the connection between color steel plates and purlins, wall beams, etc. Their penetration capacity generally does not exceed 6mm, and the maximum does not exceed 12mm. Self tapping screws are often exposed outdoors and have strong corrosion resistance; Its rubber sealing ring can ensure that there is no water leakage at the screw and has good corrosion resistance.
Self tapping screws are usually described using three parameters: screw diameter series, number of threads per inch length, and screw length. There are two types of screw diameter levels: 10 and 12, with corresponding screw diameters of 4.87mm and 5.43mm, respectively; There are three levels of threads per inch: 14, 16, and 24. The more threads per inch, the stronger the self drilling ability.