Hex Head Self Drilling Screw with EPDM washer 1)Diameter: 3.5mm~6.3mm, 6#~14# 2)Length: 9.5~250mm, 3)hex self drilling scr Hex Head Self Drilling Screw with EPDM washer1)Standard: DIN, ASTM,AS ... Point,drilling Point8)Drive Type:Phillips,Pozi,Combination9)Finish: Plain, Zinc, Black Phosphated, Grey Phosphated, Nickel,Cooper,Dacroment,Ruspert the Hex Washer Head Self Drilling screw