D38999/24WF35PN is a MIL-DTL-38999 Series III subminiature connector designed for rugged, harsh environment applications in aerospace, defense, and marine industries. This straight plug connector features a threaded 360° turn coupling mechanism with environmentally sealed construction and scoop-proof design for enhanced reliability. The connector supports multiple shell materials including stainless steel, aluminum, and composite options, with various plating finishes such as electroless nickel, nickel PTFE, black zinc-nickel, and olive drab cadmium to meet specific corrosion resistance requirements. It accommodates up to 187 maximum signal contacts using AS39029 contact types in crimp, solder cup, eyelet, or PCB tail styles, with shell sizes ranging from 9 to 25 and contact sizes of 23, 22, 20, 16, 12, 10, and 8. The connector operates reliably across a wide temperature range of -65°C to +200°C depending on shell finish, with a standard durability rating of 500 mating cycles and optional higher-durability versions available. Its EMI spring fingers, hermetic and filter versions, combined with multiple mounting configurations, make it ideal for critical interconnect applications requiring environmental sealing and electromagnetic shielding in demanding operational environments.