Bolts ASTM A325, A490, Nuts ASTM A563 Washers ASTM F436/F436M

HIGH STRENGTH BOLT: ASTM A325 Type.1, TYPE 1(M16,M20, M22) AND A490, TYPE 1(M24) HEAVY HEX NUT: ASTM A563, HEAVY HEX, GRADE DH WASHER: ASTM F436/F436M