CUNO self-cleaning metal edge filter assembly is a stack of alternating metal discs and spacers of uniform thickness, on a rotatable metal shaft. Each CUNO self-cleaning metal edge filter assemblies consist of a metal filter cartridge composed of a stack of alternating metal discs and spacers on a rotatable metal shaft and a filter sump gasket sealed and attached to the filter head by a clamping ring and four bolts. The thickness of the spacer determines the degree of filtration.