... :carbon steel,stainless steel 3.Brand:ZG Square Head Bolt 1.Standard:DIN,ANSI,BSW,ISO 2.Material:carbon steel,stainless steel ... ,A4-80Surface treatmentZinc,Chrome,Black,Nickel,Dacromat,HDG,Protective oilStandardGB,DIN,JIS,ANSI/ASME,ISO and No-StandardPackingStandard neutral carton,can ...