Hex Head Self Drilling Screw with EPDM washer 1)Diameter: ... : 9.5~250mm, 3)hex self drilling scr Hex Head Self Drilling Screw with EPDM washer1)Standard: DIN, ASTM ... 5)Thread: AB TYPE,A TYPE6)Head Type:Pan Head,Flat Head,Hex Head,Bugle Head,Wafer Head,Truss Head7)Point Type:Sharp Point, ... , Zinc, Black Phosphated, Grey Phosphated, Nickel,Cooper,Dacroment,Ruspert the Hex Washer Head Self Drilling screw