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 must 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.

Features of self tapping screw

1. Self-tapping screw is a kind of screw with drill bit. The hexagon socket bolt is constructed by special power tools, drilling, tapping, fixing and locking 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 plate and color steel plate, the connection between color steel plate and purlin, wall beam, etc.

Its penetration capacity is generally not more than 6mm, the maximum is not more than 12mm.

2. Self-tapping screws are often exposed to the outdoors and have strong corrosion resistance;The rubber sealing ring can ensure that the screw is impermeable and has good corrosion resistance.

Its characteristics and common types

1, self tapping screws using carburized steel production and processing.

2. Heat treatment is needed in the processing process to make its mechanical properties meet the requirements.

3, self-tapping screws have good internal toughness and high surface hardness.

4, the surface needs to be electroplated protection treatment.

5, production needs cold heading process, improve the quality of thread.

There are many types of self-tapping screws, and there are several common ones

1, ordinary self-tapping screw: this is the most common type, the screw surface will be electroplated.

2, self-cutting self-tapping screw: the screw thread is generally self-tapping thread or machine thread.

3, self-extrusion self-tapping screw, its screw cross section most tri-prism, generally do not need slots when using.