... :3.5mm~6.3mm,6#~14 Hex Head Self Drilling Roofing Screws 1)Standard: DIN, ASTM,AS,GB2)Material: Carbon Steel,SUS3 ... : AB TYPE,A TYPE6)Head Type:Pan Head,Flat Head,Hex Head,Bugle Head,Wafer Head,Truss Head7)Point Type:Sharp ... Point,drilling Point8)Drive Type:Phillips,Pozi,Combination9)Finish: Plain, Zinc, Black Phosphated, Grey Phosphated,Nickel,Cooper,Dacroment,Ruspert DiameterST2 ...