D38999/24WB98PN is a MIL-DTL-38999 Series III subminiature connector designed for rugged aerospace, defense, and marine applications. This connector features a threaded 360° turn coupling mechanism and is available with shell materials including stainless steel, aluminum, and composite, with multiple plating options such as electroless nickel, nickel PTFE, black zinc-nickel, and olive drab cadmium. The connector supports up to 187 maximum signal contacts with standard contact sizes of 23, 22, 20, 16, 12, 10, and 8, accommodates shell sizes from 9 to 25, and offers contact styles including crimp, solder cup/eyelet, and PCB tail configurations. Operating temperature range extends from -65°C to +200°C depending on shell finish, with a standard durability rating of 500 mating cycles. Key features include scoop-proof design, environmental sealing, hermetic versions, filter versions, and spring fingers for EMI control, making it ideal for demanding applications requiring reliable electrical connectivity in harsh environments.