Hex Head Self Drilling Roofing Screws 1)Standard: DIN, ASTM,AS,GB 2)Material: Carbon ... 6.3mm,6#~14 Hex Head Self Drilling Roofing Screws 1)Standard: DIN, ASTM,AS,GB2)Material: Carbon Steel, ... : 3.5mm~6.3mm, 6#~14#4)Length: 9.5~110mm, 3/8"~4-1/2"5)Thread: AB TYPE,A TYPE6 ... ,Cooper,Dacroment,Ruspert DiameterST2.9-ST6.3 #4-#14Length6.5mm-130mm 1/4"-5"StandardDIN,ANSIM,ISO,IFIMaterialstainless steeel 410.304 ...