Detailed Product Description Hexagon NutsFeatures:1)Standard: DIN934/555,DIN936/439,UNI5587,IFI D6/D12,BS916,ISO4032,ASTM 1942)Size: M3-M80,1/4"-3"3)Material: low carbon steel, carbon steel 35#, stainless steel, brass4)Grade: 04,05,/8/,8,10,GR.2H5)Surface: Plain, Black, Zinc Cr+3,Yellow Zinc Cr+6,H.D.G.,Dacromet,etc.Packing: bulk, box packing, polybag