D38999/24WD18PN is a MIL-DTL-38999 Series III jam nut receptacle connector designed for military and aerospace applications. It features an aluminum shell with olive drab cadmium over electroless nickel base finish (Class W) and shell size D with insert arrangement 18. The connector is equipped with pin contacts (P) and normal polarization (N) keying configuration. This connector meets military specifications and is suitable for demanding environments requiring reliable electrical connections in defense, aviation, and industrial applications where rugged performance and environmental resistance are critical.