... ,ISO 4.Zinc or Nickel plated,Black Oxide,HDG Roofing bolt 1. Standard:DIN, ANSI, BSW, JSB ans ISO standard or ... &design.2. Material:Carbon steel, Alloy steel, stainless steel or according require.3. Grade of Roofing bolt:Metric standard: Grade 4.8 ... details examples: MaterialStailess steel SS301, SS304 SS316 SS430,carbon steel,alloy or as request Finishnickel plated, passivation,black oxide,self color ...