D38999/26WJ24PN 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 environmental sealing for reliable performance in demanding conditions. It supports multiple shell materials including stainless steel, aluminum, and composite, with various plating options such as electroless nickel, nickel PTFE, black zinc-nickel, and olive drab cadmium. The connector accommodates up to 187 signal contacts with standard contact sizes of 23, 22, 20, 16, 12, 10, and 8, using AS39029 contact type in crimp, solder cup, eyelet, or 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 hermetic sealing, EMI control with spring fingers, and filter versions, making it suitable for critical aerospace, defense, and marine systems where environmental protection and reliability are paramount.