... .non-standerd parts Item Nostainless steel self drilling screws Materialsiron,aluminum,steel,copper,plastic,carbon steel,nylon,bronze,solder alloy,HSS, ... ,grinding machine,automatic lathe machine,conventional lathe machine,EDM,wire-cutting machine,CNC bending machine etc.Test machinedigital height ... once we receive your valued enquiries with detail specification. stainless steel self drilling screws