The Development Prospect Of Self-Tapping Screws

Since 1914, self-tapping screws have been commercialized. The first design - mainly derived from wood screws - is a carburized steel cone-tail A-type thread forming screw. The main use at that time was for the joining of iron sheets on air-conditioning system conduits, so it was also called iron sheet screws. After more than 80 years of development, it can be divided into four periods—thread forming, thread cutting, thread rolling and self-drilling.