M1.2 carbon steel hardened thin head black zinc plated screw

Industry knowledge：

How many types of precision electronic screws are there?

Precision electronic screw generally has two kinds of thread: one is mechanical tooth, the other is self tapping. The difference between the two products lies in the thread type and angle. For the precision electronic screw of mechanical teeth, the product should be drilled in advance to match the screw. The thread of mechanical teeth is usually thin and easy to use. It is usually used with nuts. When assembling screws, screw the screws into the parts and tighten them to play a fixed role. Another kind of precision electronic screw with self tapping thread is mostly used in non-metallic products. Contrary to mechanical thread, it is not necessary to tap the thread in advance. Most of them are used in plastic shell. Its thread shape is closely related to the material hardness and bearing capacity of plastic parts. Different materials of plastic parts, involving the form of self tapping thread is different, self tapping screw anti drop effect is better.