... prompt delivery 5.non-standerd parts Item Nostainless steel self drilling screws Materialsiron,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 ... your valued enquiries with detail specification. stainless steel self drilling screws