Bolts, Nuts & Washers are available in different standards, finishes and sizes. DIN STANDARDS BOLTSNUTSWASHERSDIN 931 (Partial Thread)Hex Bolts Grade 8.8DIN 934 Hex Nuts Grade 8DIN 125 DIN 127 Flat Round Washers Spring Lock WashersDIN 933 (Full Thread) Hex Bolts Grade 8.8DIN 934 Hex Nuts Grade 8DIN 125 DIN 127 Flat Round Washers Spring Lock WashersDIN 6914 H.S.Hex Bolts Grade 10.9DIN 6915 H.S Hex Nuts Class 10DIN 6916 Hardened Flat Washers Coating: Black, Electro Galvanized, Hot Dip Galvanized for all standards except for DIN 6914 which is only supplied in Black. Coating of DIN 6914 is not recommended.