D38999/26WC35PN is a MIL-DTL-38999 Series III subminiature straight plug connector designed for rugged, harsh environment applications in aerospace, defense, and marine industries. The connector features a threaded 360° turn coupling mechanism with scoop-proof design and environmentally sealed construction, offering protection against contamination and moisture ingress. It supports multiple shell materials including stainless steel, aluminum, and composite, with various plating options such as electroless nickel, nickel PTFE, and black zinc-nickel for enhanced corrosion resistance. The connector accommodates up to 187 signal contacts with standard contact sizes of 23, 22, 20, 16, 12, 10, and 8, using AS39029 contact types available in crimp, solder cup, eyelet, and PCB tail styles. Operating temperature range extends from -65°C to +200°C depending on shell finish, with a standard durability rating of 500 mating cycles. This connector is ideal for applications requiring reliable electrical connections in demanding environments where environmental sealing, EMI control via spring fingers, and high durability are essential.