... , Surface,Zinc plated ,Hot dip galvanized,Black,Plain Size,M3-M48 Name of trade,Hex black Nuts Standard,DIN ANSI BSSize,M3-M48Material,Carbon ... steelSurface,Zinc plated ,Hot dip galvanized,Black,PlainProduct Origin, Haiyan ... size,260X260X140. 20FT FCL:17-24MT. Certification(s), ISO9001:2000. Hex black nuts