hex bolt 1.Bolt Size,M4-M100 2.Bolt Material,stainless steel,carbon steel 3.SGS,ISO 4.zinc ... , Alloy steel, stainless steel or according require3. Grade of hex bolt:Metric standard: Grade 4.8, Grade6.8, Grade8.8, Grade10 ... , Nickel, phosphate black, DACROMET coating, etc.7. Packing of hex bolt:General packing: 20-25Kg per Carbon, 36-64Carbon/Pallet. or ...