530347-3 is a nickel-plated brass rivet designed for use in keying hardware assemblies for 2-, 3-, and 4-row pin header connectors qualified to MIL-C-55302. The rivet is part of keying pin kits (Kit Part Number 530341-51) and guide keying pin and insert kits (Kit Part Numbers 531715-11 and 531715-21), providing secure mechanical fastening for external keying components. The rivet features nickel plating for corrosion resistance and is compatible with rivet clinching tools for 2-row, 3-row, and 4-row pin header assemblies. These rivets are essential components in aerospace, defense, and marine connector systems where reliable keying and alignment are critical for maintaining proper connector mating and preventing incorrect insertions.