... , DIN7983 ASME B18.6.4 & SAE J933 specifications Self Tapping ScrewsDIN7971, DIN7972, DIN7973, DIN7981, DIN7982, DIN7983 ASME B18.6 ... .4 & SAE J933 specificationsSelf tapping screws are most often used to fasten sheet metal composite ... and disassembly. There are three different kinds of self tapping screws: thread forming, thread cutting, and thread rolling.Specifications ...