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