MIL-DTL-38999/20MF18PD is a high-performance circular connector designed for harsh environments. Featuring a wall-mounting flange receptacle with removable crimp contacts, this connector is part of the military-spec Series III. With 18 gold-plated contacts in a size 8Twinax(4) and 22D(14) arrangement, it ensures reliable conductivity in extreme conditions. The composite shell construction, with Electroless Nickel and Electrodeposited Nickel finish coatings, offers superior durability and environmental resistance. With a wide operating temperature range from -65°C to 200°C, and a service rating of M and Twinax, this connector is ideal for demanding applications. Additionally, its Nickel Plated Composite Shell design and M service class detail guarantee longevity and performance, making it a reliable choice for aerospace, defense, and other high-reliability applications.