Quick Details Finish: "ZINC PLATED, Black Oxide, Galvanized, passivated, Zinc-Flake Coated, Nickel Plated, Blue Phosphate, Zinc and Wax, Zinc Yellow-Chromate Plated, Yellow Blue White Zinc" Place of Origin: Hebei, China Brand Name: TYB Model Number: M5-M64 Standard: DIN, ASME/ANSI B18.2.2 Material: Carbon Steel Surface treatment: Galvanized Grade: 4 6 8 10 Certificate: ISO9001: 2008 Size: M5-M64 Name: Hexagon Nut Product name: Hex Nut DIN934 Type: Hexagon Head