NEWS CENTER

1. Ordinary Self Drilling Screws With Wings (Thread Forming Self Drilling Screws With Wings)

Common Self Drilling Screws With Wings are a direct outgrowth of early sheet metal screws. The principle is: when it is screwed into the prefabricated hole, the internal thread connected with the screw is formed by displacing the material next to the hole and pushing the material into the gap between the threads.

2. Self-cutting Self Drilling Screws With Wings (Thread Cutting Self Drilling Screws With Wings)

Because ordinary Self Drilling Screws With Wings thread forming can only be easily realized on relatively thin and tough materials. Develop and expand the use of Self Drilling Screws With Wings to thicker sections and harder, brittle and other materials with poor deformability. This led to the development of Self Drilling Screws With Wings: a cutting groove or edge is machined at the end of the screw shank. When such a screw is screwed into a prefabricated hole, the screw acts as a tap, actually cutting the thread to which it attaches.