Hexagon nut 1.DIN934 ,985 ,ISO qualifited 1.Material: low carbon steel2.Diameter:5-20mm3.plain ,zincification, black ,,nickel,chrome,and various type nuts4.Our products are made of steel and other metal materials in accordance with the ISO ,DIN and other main standards.5.We are specialized in producing 1000 different styles with 200 models.6.we can also produce basing on customers' special ...