Bolts Specs ASTM A325/ASTM A325M/ Nuts Specs ASTM A563/ASTM A563 M, Washers specs ASTM F436 /ASM F436 M
Normally supplied in Hot Dip Galvanized. These bolts has heavy Hexagon Heads and nuts.
other structural Bolts Are BS, EN ISO DIN Specification CL 8.8 bolts nut CL 8 , Washers DIN 125 , comes in GI and Hot Dip Galvanized, It has normal Hex asp per DIN 931, DIN 933, DIN 934