MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert and offering reliable performance in temperatures ranging from -65 °C to 200 °C. These connectors, with various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, are ideal for military and aerospace applications. Made of aluminum, they come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. The plugs, available in straight, RFI grounding and standard configurations, ensure secure and efficient connectivity. With plating options including cadmium and nickel finishes, they guarantee durability and conductivity. RoHS compliant variants are also available, meeting environmental regulations. A versatile choice for critical operations, these connectors deliver high performance and reliability in demanding scenarios.