D38999/26WD35PA is a MIL-DTL-38999 Series III straight plug connector designed for reliable signal, power, and control transmission in aerospace, defense, and marine environments. The connector features a composite shell with electroless nickel plating (2000-hour salt spray rating) and accommodates various insert arrangements and contact configurations. It utilizes a triple-start, self-locking threaded coupling mechanism for secure mating and includes standard pin contacts. The connector is qualified to military specifications and is suitable for applications requiring corrosion resistance, high vibration tolerance, and extreme temperature operation from -65°C to +200°C. Common uses include avionics, missiles, sensors, fuel tank systems, and sealed environments where rugged, reliable electrical interconnection is critical.