Ball stud,hexagon bolt,threaded rod Various of specifications and size. Ball stud,hexagon bolt,threaded rod1.Material: Carbon Steel,Alloy Steel,Stainless Steel2.Surface: Natural colour, Zinc Plated, Hot dip galvanized,.Black3.Size: M6~M524.Bolts used in briges, building, machinery, petrol and other industries.5.All kinds of specifications intensities and GB standars available.