What is a self tapping screw? As the name suggests, it is simply a screw that can be tapped by yourself. The difference between self-tapping screws and general screws is that general screws must have processed screw holes to be screwed in. Self-tapping screws are not required. Tapping is done while screwing in. In order to achieve the purpose of self-tapping, this type of hexagonal drilling screws are generally pointed, so that it is easy to squeeze into the object to be screwed.
The biggest feature of self-tapping screws is that they do not need to be used with nuts, and can be locked and connected by their own threads. It is very common and commonly used screw-in daily life. When the self-tapping screw is screwed into the hole in the plastic metal material, the internal thread can be formed in the hole by the action of extrusion. This is the secret of self-tapping and self-drilling of the self-tapping screw. Among them, a special self-tapping screw used for threading metal holes is called a wiretap.
In the use of self-tapping screws, many people may face the lack of some tools or do not know what tools should be used to tighten self-tapping screws. The custom alloy steel head screw factory will give you a brief introduction to self-tapping How to screw in.
Self Tapping Screw
In fact, the screw can be driven in with an air screwdriver, screwdriver, gun drill, or electric hammer. Generally, it is necessary to use an electric hammer when driving into the concrete. The concrete wall with the label above C10 cannot be nailed with ordinary nails. If the load-bearing requirement is not high, cement steel nails can be used directly; if the load-bearing requirement is high, it needs to be fixed with expansion screws, ordinary plastic expansion tubes, and self-tapping screw models.
1. Self-tapping screws are used for non-metallic or softer metals, without bottom holes and tapping, but they are not suitable for direct use on walls. When using it on a wall, you need to drill a hole first, put a plastic "wire sleeve" in the hole, and then screw in the self-tapping screw (similar to the nature of an expansion screw).
2. Self-tapping screws are suitable for the use of wood materials, that is, wood screws we often say. Cement nails can be used to hang the clock on the wall. It is recommended to use 2.5-3 cm long. It is best to measure the hanging position first when smashing the nail, then make the mark, and then use transparent tape to stick on the previous mark. The tape size is 3CM*3CM so that it will not cause the wall skin to fall off when hitting the nail. Today's houses are all frame structures, and the walls are made of cement, which is harder, so cement nails are needed.
3. The nailhead of the self-tapping screw is pointed, and it can be directly screwed without punching first, but the self-tapping screw is not suitable for directly screwing on the wall, and can be directly screwed on wood, plastic, metal with low hardness. To drill holes in the wall, it is best to use an impact drill. After the plug is tightened, the screws can be tightened. Freehand nails will definitely not work.