Round head cross drill tail wire

Material has iron, stainless steel two kinds of stainless steel is divided into a variety of materials.Model: φ4.2 / φ4.8 / φ5.5 / φ6.3mm, the specific length can be agreed according to requirements. Name Cross recessed round head self-drilling screws with pad Standard YJT 4053 Size M3.5～M6.3 Length 25mm～120mm Grade 4.8 5.8 6.8 8.8 Material Material has iron, stainless steel two kinds of stainless steel is divided into a variety of materials. Model: φ4.2 / φ4.8 / φ5.5 / φ6.3mm, the specific length can be agreed according to requirements. Surface The surface hardness and core hardness of the drilling screw is higher than that of the general self-tapping screw. This is because the drilling screw has more than one drilling operation. In addition, the drilling screw needs to be penetrated to test that the screw can drill and tap the thread in the specified time. Description The screw is a tool that uses the physical and mathematical principles of circular rotation and friction of the inclined plane of the object to tighten the object gradually. A drill tail screw is a screw with a self-tapping drill head at the front end. Tail drilling screws are also called self drilling screws. Construction operation technology Self Drilling Tapping (also known as Tec). In the process of assembling self-tapping Screws, the most costly is the preparation of pre-drilling. The use of self - tapping screws, must be drilled first, and the aperture must be limited. No pre-drilling is required and in some ways cost savings can be achieved. This is the set drilling, tapping, screw in a single operation of drilling self - tapping screw. Scope of application The tail of the drill tail screw is in the shape of drill tail or sharp tail, without auxiliary processing, can directly drill, tap and lock on the setting materials and basic materials, greatly saving the construction time. Compared with ordinary screws, its high pulling force and maintenance force, long time after combination will not loosen, the use of safe drilling and tapping a complete operation is simple. Mainly used in the steel structure of the color steel tile fixed can also be used for simple building plate fixed. It cannot be used for metal to metal bonding. Keywords: Round head cross drill tail wire