Self tapping Screw and Flat Head Screw

Do you know the difference between self tapping screw and flat head screw? Have you ever understood and analyzed the difference between them? If you don't understand it or don't understand it, let's move on.

Self-tapping screw, we have seen, generally fingertips, thick teeth and hard wood screw, of course, there are also aluminum alloy, plastic. A special self-tapping screw for opening threads in metal holes is called tapping. Self-tapping screw is used for non-metal or soft metal, without punching bottom hole and tapping; self-tapping screw is pointed, so as to "self-tapping"; ordinary screw is flat head, the thickness is the same.

But for flat head screw, it has a screw body. The axle surface of the screw body forms an axially extended screw tooth, and at least one slot is arranged at the end of the slot. The slot above the slot is then digged into the center of the screw body, and the slot is deep inside the screw body and beyond the center line of the screw body. The angle provides the function of avoiding chip blocking the notch. It is mostly used in construction sites and other projects. Electric dispatch of power system in hydropower station.

The difference between self-tapping screw and flat-head screw is that self-tapping screw does not need to tap the hole. The screw used is different from the general one. The head is pointed and the tooth spacing is relatively large. It is somewhat similar to the scrap-free tapping. It can be directly screwed in without tapping. Metal and plastic usually use this method. It can be in the consolidated material, depending on its own thread, will be consolidated body "tap-drill, squeeze, press" out the corresponding threads, so that they closely cooperate with each other. Flat head screw is mostly used in construction site and other projects. Electric Power Dispatching of Hydropower Station Power System