5205821-2 is a hex nut hardware component designed for use with AMPLIMITE D-subminiature connectors. It features a yellow chromate body finish for corrosion resistance and a 4-40 thread size for secure fastening. The component is supplied as a loose piece and is RoHS/ELV compliant. This hex nut is commonly used in D-subminiature connector assemblies to provide secure mechanical attachment and strain relief in electronic applications.