Hex bolt 1.Bolt Size,M4-M100 2.Bolt Material,stainless steel,carbon steel 3.SGS,ISO 4.Zinc or Nickel plated,Black Oxide,HDG Hex bolt1. ... Standard of hex bolt:DIN931/933, DIN558/601; DIN6914, DIN960/961, ... (Galv), Hot Dip Galvanized, Nickel, phosphate black, DACROMET coating, etc.7. Packing of hex bolt:General packing: 20-25Kg per Carton, 36 ...