... Steel,SUS 3)Diameter:3.5mm~6.3mm,6#~14 Hex Head Self Drilling Roofing Screws 1)Standard: DIN, ASTM,AS, ... /2"5)Thread: AB TYPE,A TYPE6)Head Type:Pan Head,Flat Head,Hex Head,Bugle Head,Wafer Head,Truss Head7)Point Type:Sharp Point,drilling Point8 ... .304.316 and so onHead CodeCSK,pan head,truss head,hexagon head,round head,oval head in cross recessed,combined,torx,slottedThread Codefull thread,half thread ...