... ,ISO 4.Zinc or Nickel plated,Black Oxide,HDG Hex bolt1. Standard of hex bolt:DIN931/933, DIN558/601; DIN6914, DIN960/961, ANSI ... steel, Alloy steel, stainless steel or according require3. Grade of hex bolt: Grade 4.8, Grade6.8, Grade8.8, Grade10.9,Grade12 ... , Zinc plated (Galv), Hot Dip Galvanized, Nickel, phosphate black, DACROMET coating, etc.7. Packing of hex bolt:General packing: 20-25Kg per Carton ...