... 3. Customer First,Service Fi Standard and Non-standard Self Drilling Screw • Material: Carbon steel & stainless steel ... plain finish , Black Oxide • Plating:BlackOxide,Zinc,Chrome,Galvanized,Nickle,Dacromet, Delta-Tone, Geomet,Ruspert• Packing: AS ... :ISO, DIN, ANSI, JIS, BS, Non-standardSurface :Galvanized (Various of color), dacromet, blackened, phosphatingCertificationISO/TS16949,ISO9001, ...