First, what is the difference between self-tapping screws and drilling screws? Although both self-tapping screws and self-drilling screws are threaded fasteners, they are different in shape, use and usage. First of all, in terms of appearance, the lower end of the drilling screw comes with a drilling tail, similar to a small drill bit, professionally called the milling end, and the lower end of the tapping screw has no drilling tail, just a smooth thread. Secondly, it is different in use, and self-tapping screws are usually used on non-metallic or iron materials with low hardness. Because the self-tapping screw can drill, squeeze and tap out the corresponding thread on the fixed material through its own thread, so that they are closely matched with each other. The drilling screws are mainly used for light steel structures, can penetrate thin steel plates, and are more widely used in various building structures and industrial structures. Finally, usage is different. The tip of the self-tapping screw is sharp, and the tail is not drilled. Therefore, before fixing, it is necessary to use an electric drill or a pistol drill to make prefabricated holes in the object, and then screw the self-tapping screw into it. The drilling screw can be used anytime and anywhere, because its tail has its own drilling tail, which can be directly screwed on hard materials such as steel plate and wood, without prefabrication holes, and its drilling tail can be synchronously drilled during the screwing process. In general, drilling screws and self-tapping screws have some obvious differences in many aspects, and enterprises or consumers need to choose according to the specific scenario and actual needs.
Drilling screw Drilling screw is a kind of wood screw, because its front end has a drilling bit named, also known as self-drilling screw or dovetail screw. According to its different drilling tail, drilling tail screws can be divided into round head rice/cross/plum, countersunk head (flat head)/ rice/cross/plum, hexagonal washer, round head washer (large flat head), horn and other types. Drilling screws are mainly used on light steel structures or wood, allowing users to quickly and accurately fix wood or steel structures together. 2. Self-tapping screws Self-tapping screws are a kind of negative grain screws, which are usually used to match steel plates, iron plates or other materials with low hardness according to the different materials. It should be noted that the self-tapping screw is not required to be used with the nut, and it can easily complete the process of drilling and tapping through its own strong force. In the actual use process, it is particularly important to select the correct type of drilling screw or self-tapping screw for the stability and efficiency of the fixing operation. Enterprises or consumers can choose different types of screws according to actual needs and scenarios to achieve the best fixing effect.
