It can be consolidated in the material, by its own thread, will be consolidated body [Drill-drill, extrusion,"out of the corresponding thread, make it close to each other.
Self tapping screw is a kind of screw with a drill bit, through the construction of special power tools, drilling, tapping, fixing, locking once completed. The self tapping screw is mainly used for the connection and fixing of some thin plate parts, such as the connection of Color Steel Plate and color steel plate, the connection of Color Steel Plate and Purlin, wall beam, etc. . Self-tapping Screws are often exposed to the outside world and have strong corrosion resistance of their own. The rubber sealing ring ensures that the screws are impervious to water and have good corrosion resistance.
Self tapping screws are usually described by three parameters: screw diameter series, number of threads per inch and screw length. There are 10 and 12 grades of screw diameter, the corresponding screw diameter is 4.87 mm and 5.43 mm, and the number of threads per inch is 14,16 and 24 grades. The more threads per inch, the stronger the self-drilling ability.
Tapping screws, self drilling screws,non metallic or softer metal
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