Hex Head Self Drilling Screw with EPDM washer 1)Diameter: 3. ... Length: 9.5~250mm, 3)hex self drilling scr Hex Head Self Drilling Screw with EPDM washer1)Standard: DIN, ASTM, ... 2"5)Thread: AB TYPE,A TYPE6)Head Type:Pan Head,Flat Head,Hex Head,Bugle Head,Wafer Head,Truss Head7)Point Type:Sharp Point,drilling Point8 ... , Grey Phosphated, Nickel,Cooper,Dacroment,Ruspert the Hex Washer Head Self Drilling screw