D38999/26FE35PN 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° coupling mechanism with environmentally sealed construction and electroless nickel plating (48-hour salt spray rating). The connector supports multiple shell sizes (9 through 25), accommodates up to 187 signal contacts with AS39029 contact type, and offers contact styles including crimp, solder cup/eyelet, and PCB tail configurations. Operating across a temperature range of -65°C to +200°C (depending on shell finish), with 500 mating cycles durability and optional higher-durability versions available, this connector provides scoop-proof design with EMI spring fingers for enhanced electromagnetic interference control. Its robust construction and comprehensive feature set make it ideal for critical aerospace and defense applications requiring reliable electrical connectivity in demanding environments.