... 4.prompt delivery 5.non-standerd parts Item Nocross recess head screwsMaterialsiron,aluminum,steel,copper,plastic,carbon steel,nylon,bronze,solder ... coating,galvanized,electroplating,spraying,painting and so onBusiness scopeCNC center machining,drilling,turning,grinding,tapping,mould design and processing,casting,sheet ... receive your valued enquiries with detail specification. cross recess head screws