... equipments 4.prompt delivery 5.non-standerd parts Item Noself tapping screwsMaterialsiron,aluminum,steel,copper,plastic,carbon steel,nylon,bronze, ... electroplating,spraying,painting and so onBusiness scopeCNC center machining,drilling,turning,grinding,tapping,mould design and processing,casting,sheet mental working ... once we receive your valued enquiries with detail specification. self tapping screws