1). Size:M5-M20; 2). Grade: 4.8, 6.8, 8.8, 10.9, 12.9 3) Finish: zinc plated, balck Feature1). Size:M5-M20; 1/4"-5/8" Length:6-200mm; 3/4"-5"2). Grade:4.8, 6.8, 8.8, 10.9, 12.93). Material:stainless steel, carbon steel, brass, high tensile and alloy;4). Treatment:Plain, hot dip galvanizing, Phosphated, Zinc, Nickel, Dacromet, black oxide5). Standards:DIN933, DIN931, IFI C-6, IFI C-10, DIN558, ...