... .2 4.Surface:Hot dipped Galv,Zinc yellow ,PTFE STUD BOLTS and U_BOLTS:1. Din 975, class 4.8, class 8 ... to 12' 5. Finish: Plain, black ,zinc plated, hot dip galvanized,PTFE,Xylan.HEX BOLTMaterial: ASTM A193 B7,B8,B8M.Specification ... , Nickel Plating .Packing: Carton/pallet ,or as customers' requirements. Stud bolts & nuts