Standard: DIN ANSI BS GB Material: carbon steel, stainless steel, 35 #, 45 #, 35croma, 42croma or assigned Diameter: M8-56 Length: 5-2000 (mm) Threaded tolerances: 0.01-0.05% Threaded: metric, thick tooth, fine teeth, imperial Mechanical properties: 4.8 level 8.8 level 10.9 class 12.9 Surface treatment: the natural color, galvanized, black, nickel, chromium plating, galvanizing Packing: carton, carton, sacks, pallets