Self Tapping Screws are used for metal or soft metal, and do not hit the low hole and tapping, Self Tapping Screws are pointed, so as to "self-tapping", however, ordinary screws are flat head, the thickness of the line. Since tapping is said: drill hole without tapping the holes, using screws and general different head for sharp, teeth from the relatively large, with no crumbs a bit like wire tapping, you can not tapping directly into the rotation, metal and plastic usually to use this method. It can be consolidation of the material, by its own thread, will be consolidated body "attack - drilling, squeezing, pressure," the corresponding thread, so that work closely with each other.
Self Tapping Screws are screws with a drill, power tools through a dedicated construction, drilling, tapping, fixed, self-tapping screws tighten the lock once complete. Self Tapping Screws for a number of thin plates and fixed connections, such as color and color steel plate connection, color steel plate and purlins, wall-beam connection, with its ability to penetrate not more than 6mm, the maximum not more than 12mm. Self Tapping Screws are often exposed to the outdoors, its strong corrosion resistance, the rubber seals to ensure no water seepage at the screw and has good corrosion resistance. Usually Self Tapping Screws screw diameter series, the number of threads per inch and the length of the three parameters to describe the length of the screw. Screw diameter series with 10 and 12 two, respectively, the corresponding screw diameter and 4.87mm 5.43mm; the number of threads per inch length of three levels have 14,16,24, the number of threads per inch the more their self- drilling capacity of the stronger.