Self-Tapping Screw System Introduction
A self-tapping screw is a kind of screw with a drill bit. It is constructed by a special electric tool, and the drilling, tapping, fixing and locking are completed at one time. Self-tapping screws are mainly used for the connection and fixation of some thinner plates, such as the connection between color steel plates and color steel plates, the connection between color steel plates and purlins, wall beams, etc. The penetration capacity generally does not exceed 6mm, and the maximum does not exceed 12mm. Self-tapping screws are often exposed outdoors, and they have strong corrosion resistance; their rubber sealing rings can ensure that the screws do not seep into water and have good corrosion resistance. Self-tapping screws are usually described by three parameters: screw diameter series, number of threads per inch length, and screw length. There are 10 grades and 12 grades of screw diameters, and the corresponding screw diameters are 4.87mm and 5.43mm respectively; the number of threads per inch length is 14, 16, and 24 grades. The better the drilling ability.
