What Is A Self-Tapping Screw?
A self-tapping screw is a kind of screw with a drill bit, which is constructed by a special electric tool, drilling, tapping, fixing and locking are completed at once. The installation of self-tapping screws is straightforward, relying on its threads, the fastening principle of screw fasteners, tapping – drilling – squeezing – pressing this step is combined.
As a professional fastener manufacturer, Xinchi is pleased to introduce the relevant content of self-tapping screws.
Definition of self-tapping screws
Self-tapping screws are generally fingertip, coarse teeth, and hardwood screws, as well as aluminum alloy and plastic. A special self-tapping screw for opening metal holes is called a tap. Self-tapping screws drill holes without tapping holes, with screws and general different, the head is pointed, the tooth distance is relatively large, and the chip-free tap is a bit like, you can directly screw in without tapping teeth, metal and plastic usually use this method. Self-tapping screws can be consolidated on the material, relying on its own thread, the consolidated body will “tap – drill, squeeze, press” out of the corresponding thread, so that they are closely matched with each other.
Features of self-tapping screws
Self-tapping screws are mainly used for the connection and fixing of some sheet parts, such as the connection of color steel plate and color steel plate, color steel plate and purlin, wall beam connection, etc., its penetration capacity is generally not more than 6mm, the maximum is not more than 12mm.
Self-tapping screws are often exposed to the outdoors, and have strong corrosion resistance; The rubber sealing ring can ensure that the screw does not seep water and has good corrosion resistance.
Self-tapping screws are usually described by three parameters: screw diameter series, number of threads per inch length and screw length. There are 10 and 12 screw diameter classes, and the corresponding screw diameters are 4.87mm and 5.43mm respectively. The number of threads per inch length has 14, 16, and 24 three levels, the more the number of threads per inch length, the stronger its self-drilling ability.
How to install self-tapping screws
Use a manual screwdriver, select the corresponding screwdriver according to the groove shape of the self-tapping screw, align the mouth of the screwdriver with the groove shape of the screw, and directly squeeze the screw, turn the screwdriver in the hand clockwise, and rotate the self-tapping screw into the workpiece bit by bit until the thread of the whole screw has not been placed in the workpiece.
The use of power tools, power tools are more convenient and easier to install, their working principle is the same as a manual screwdriver, but the use of an electric screwdriver can be faster and easier to install self-tapping screws.
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