... 5.non-standerd parts Item Nostainless steel self drilling screws Materialsiron,aluminum,steel,copper,plastic,carbon steel,nylon,bronze,solder alloy,HSS,tool ... and so onBusiness scopeCNC center machining,drilling,turning,grinding,tapping,mould design and processing,casting,sheet mental working ett. ... once we receive your valued enquiries with detail specification. stainless steel self drilling screws