What are the performance characteristics of self - tapping s

What is self tapping screw? As the name implies, self-tapping screw is simply a screw that can tap on its own.

I found that many friends on the network are very concerned about what is the self-tapping screw, the difference between the self-tapping screw and the general screw is that the general screw should have a good processing screw hole to screw in. Self-tapping screws do not need, in the screw-in at the same time their own tapping. In order to achieve its own tapping purpose, the hexagonal drill screws are generally pointed, for easy to squeeze into the object to be screwed in.

1. The self-tapping screw is a screw with a drill bit. The hexagon socket bolt is constructed by a special electric tool. The drilling, tapping, fixing and locking are completed in one time. Self-tapping screws are mainly used for the connection and fixation of some thinner plates, such as the connection of color steel plates and color steel plates, the connection of color steel plates and purlins, wall beams, etc. The penetrating ability is generally not more than 6mm and not more than 12mm.

2. Self-tapping screws are often exposed outdoors, and they have strong corrosion resistance; the rubber sealing ring can ensure that the screw does not seep water and has good corrosion resistance.

3. Self-tapping screw is suitable for wood material, which is often called wood screw. Generally manual operation, due to manpower restrictions, this kind of screw is generally very small, the scope of use is relatively narrow.

4. Self-tapping screws are a combination of taps and bolts. The front is the tap, and the back is the thread. In general softer materials, you can directly screw in after drilling a hole. The thread is tapped by the tap, and then the thread of the bolt is strenuous. If the screw diameter is small, the material is also very soft. You don’t even need to punch holes first, such as screwing them into wood.

5. Self-tapping screws are usually described by three parameters: screw diameter series, number of threads per inch length and screw length. There were two kinds of screw diameters: grade 10 and grade 12, the corresponding screw diameters were 4.87mm and 5.43mm, respectively. The number of threads per inch is 14, 16, and 24 grades, the more threads per inch, the more self-drilling capability.