... .prompt delivery 5.non-standerd parts Item Nostainless steel self drilling screws Materialsiron,aluminum,steel,copper,plastic,carbon steel, ... treatmentheat treatment,polishing,PVD/CVD coating,galvanized,electroplating,spraying,painting and so onBusiness scopeCNC center machining,drilling,turning,grinding, ... receive your valued enquiries with detail specification. stainless steel self drilling screws