What is self-drilling and self-tapping screw

Self-drilling self-tapping screw is a new type of high-efficiency riveting fastener; self-drilling self-tapping screw is named self-drilling self-tapping screw because of its tail, also known as self-drilling tail screw, drilling tail screw, drilling tail screw, self-drilling self-tapping screw, self-drilling self-tapping self-drilling tail screw, etc. The implementation standards of self-drilling and self-tapping screw are GB/T15856-2002, DIN7504N-1995 and JIS B 1124-2003. The tail of self-drilling self-tapping screw has a self-drilling head with a drilling tail or a pointed tail. The self-drilling self-tapping screw is sucked onto the socket of the hand electric drill to open the hand electric drill directly and automatically drill, tap and lock the surface of the connecting parts in a one-time three seconds. When self-drilling self-tapping screw is used to rivet the connecting parts, there is no need for auxiliary processing on the surface and inside of the connecting parts. Self-drilling self-tapping screw can be drilled, tapped and locked directly on the setting materials and basic materials, and can be drilled automatically and fixed directly at one time. Self-drilling self-tapping screw has the highest construction efficiency. Limit saves construction time, improves construction efficiency, and improves the economic benefits of the owner. Riveted by self-drilling and self-tapping screw has strong bonding force, high pre-tightening force and high stability of the joints.



Self-drilling self-tapping screw can be divided into iron (carbon steel) self-drilling self-tapping screw and stainless steel self-drilling self-tapping screw (stainless steel self-drilling self-tapping screw can be divided into 302 stainless steel, 304 stainless steel, 410 stainless steel and many other different types) according to the head type of self-drilling self-tapping screw can be divided into flat-drilling self-tapping screw and round-tapping screw. Self-drilling self-tapping screw, large flat head self-drilling self-tapping screw, hexagonal head self-drilling self-tapping screw, Weihua head self-drilling self-tapping screw, round head self-drilling self-tapping screw and hexagonal self-drilling self-tapping screw.



Self-drilling and self-tapping screw is more and more used in automobile body, container, shipbuilding, refrigeration equipment and other assembly projects; steel structure color steel tile riveting and fixing on angle steel, channel steel and I-beam steel in steel structure engineering; billboard, construction fence, metal curtain wall, metal light compartment, construction guard plate, simple building, etc. Fixation of thin sheets such as white iron sheet, stainless steel, carbon steel, color plate, galvanized sheet, etc. When choosing self-drilling and self-tapping screw, the self-drilling and self-tapping screw of suitable type, material and size should be selected according to the different material and thickness of the fixed connecting parts needed.