Self-tapping screws with special design

Self-tapping screw is made of nail CAP, vertical with the nail Cap connections, with self-tapping threaded bolt on the body, bolt gasket, nut, bolt pads set on the key mentioned, spin the nut under it. Described the utility of self-tapping screws reinforcing steel tile roof can increase the thickness of the fastened, in line with the wind load requirements, even in high wind areas use, can still meet the safe use principle. Since attack nail can in was consolidation of material Shang, by its itself of thread, will was solid structure "attack-drill, and squeeze, and pressure" out corresponding of thread, makes of mutual close tie of stainless steel screws 1 stainless steel since attack since drill screws development: thread forming since attack screws-the Department directly by Tin screws development and to, thread forming since attack screws using Shi must advance drilling, again will screws spin into hole in the, strong extrusion tie Yin thread, and original in Yin thread location Shang of material will was squeeze to Yang thread Zhijian, This that of thread forming since attack screws. only can applies Yu thin and has plasticity of material, so and development out; thread cutting since attack nail screws in thread of tail end cutting out a or more road of cutting mouth, makes can in spin into pre drilling Shi, using screws tail and the teeth Department to similar tap of way cutting out tie Yin thread. it can with in thick Board, compared hard or easy broken, easily shaping of material, thread roll into since attack screws-the triangle teeth since attack screws, and called Type TT (Type Tai currently still has patent) Department based on forming screws attack of principle development and into, thread roll into since attack nail has special design of thread and the tail end makes screws can in intermittent of pressure Xia itself roll into tie of Yin thread. While in hole around of material can more easily of fill since attack screws thread and the teeth end of of space only can applies Yu thin and has plasticity of material, so and development out; thread cutting since attack nail screws in thread of tail end cutting out a or more road of cutting mouth, makes can in spin into pre drilling Shi, Using the screw tail and teeth similar to cutting line with female thread tap way. it can be used in the plate, hard or fragile, difficult to mold the material, thread rolling into a self tapping screw-thread screws self tapping screw, also known as the Type TT (Type Tai is still patented) is based on the principle of the screw attack evolved, Slash self tapping screws with special design of the thread and the rear end of the screw can be interrupted under the pressure of their own into line with female thread. material around the hole and can be more easily fill the self tapping screw thread