MIL-DTL-38999 Series II connectors feature up to 128 contacts and are designed for harsh environments, offering reliable performance in temperatures ranging from -65 °C to 200 °C. These environmentally sealed connectors come in various configurations, including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering multiple plating options, including RoHS certified finishes, these connectors ensure durability and longevity. Suitable for military and industrial applications, they provide EMI/RFI shielding and meet stringent military specifications for performance and reliability. With a service rating of I and a service class of T, these connectors are ideal for demanding environments where connectivity is critical.