1). Size:M5-M20; 2). Grade: 4.8, 6.8, 8.8, 10.9, 12.9 3) Finish: zinc ... -M20; 1/4"-5/8" Length:6-200mm; 3/4"-5"2). Grade:4.8, 6.8, 8.8, 10.9, 12 ... , Phosphated, Zinc, Nickel, Dacromet, black oxide5). Standards:DIN933, DIN931, IFI C-6, IFI C-10, DIN558, DIN601, ISO4014, ISO4017, DIN7990, DIN7991, DIN6914, ASTM ...