... Screws 1)Standard: DIN, ASTM,AS,GB 2)Material: Carbon Steel,SUS 3)Diameter:3.5mm~6.3mm,6#~14 Hex Head Self Drilling ... Roofing Screws 1)Standard: DIN, ASTM,AS,GB2)Material: Carbon Steel, ... ISO,IFIMaterialstainless steeel 410.304.316 and so onHead CodeCSK,pan head,truss head,hexagon head,round head,oval head in cross recessed,combined,torx,slottedThread ...