Self-tapping screw is mainly used in the steel structure of the color steel tile fixation, can also be used for simple building sheet fixation.

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.

What is 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., the 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.

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. The tapping screw is the combination of the tap and the bolt.The front is the tap, the back is the thread.In the general softer material, drill a hole can be directly screwed into.

Tapping the thread by the tap, followed by the bolt thread eat.If the screw diameter is small, the material is also very soft.You don’t even have to punch a hole first, like screw it into the 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.