... Bolt Material,stainless steel,carbon steel 3.SGS,ISO 4.zinc or nickel plated,black oxide,HDG ... DIN960/961, ANSI B18.2.1, BSW, JSB ans ISO standard.2. Material:Carbon steel, Alloy steel, stainless steel ... or according require3. Grade of hex bolt:Metric standard: Grade 4.8, Grade6.8, Grade8.8, ... Grade10.9,Grade12.9.Inch standard: Grade2, Grade5, Grade8, B7.stainless steel , A2- ...