The D38999/26FE26PN is a MIL-DTL-38999 Series III subminiature connector designed as a straight plug with electroless nickel plating on an aluminum shell, engineered for rugged, harsh environment applications in aerospace, defense, and marine sectors. This connector features a threaded 360° turn coupling mechanism, environmentally sealed construction with scoop-proof design, and spring fingers for EMI control, supporting up to 187 maximum signal contacts with AS39029 contact type. The connector operates across a wide temperature range of -65°C to +200°C depending on shell finish, offers 500 mating cycles durability (with higher durability versions available), and provides multiple contact styles including crimp, solder cup, eyelet, and PCB tail configurations. Its robust construction, combined with comprehensive shell material options (stainless steel, aluminum, composite) and multiple plating finishes, makes it ideal for mission-critical applications requiring reliable electrical connectivity in demanding environmental conditions.