Hex washer head self drilling screw standard:ANSI B18.6.4 Hex Head can be Powder Coating by RAL or Customer's Sample Standard: DIN7504K/L; ANSI B18.6.4 Material: Carbon Steel C1022A / Stainless Steel304,316,410 Size: 4.2, 4.8, 5.5, 6.3 (8#-14#) Length: 13-300mm Drive Point: No.1-No.5(S Point) Finish: Plain, Zinc Plated (Yellow/White/Blue/Black Zinc), Nickel, Black/Grey Phosphated, Black Oxide, ...