MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, with an operating temperature range of -65°C to 200°C. Specifically designed for harsh environments, these connectors come in various styles, 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. The connectors are made of aluminum with plating options such as cadmium and nickel, ensuring durability and reliability. RoHS compliant finishes are also offered. Ideal for military and aerospace applications, these connectors provide a robust solution for demanding environments.