... 3.Effect:Fastening 650PC NUT ASSORTMENTHex Nuts (Zincification) 1.Size:M3-M30,1/4"-1" 2.Material:carbon steel 3.Standard ... .Materialcarbon steel3.StandardDIN,ANSI,ISO,BS4.Surfacezinc plated,black5.Sizem3,M4,M5,M6,M8,M10,M126.Packingin bulk/plastic case ,carton box,pallet7 ...