MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature various mounting options including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. With operating temperatures ranging from -65°C to 200°C, they are suitable for a wide range of applications. The aluminum shells come in multiple plating options, including cadmium-free finishes, ensuring durability and compliance with RoHS regulations. Ideal for military and industrial use, these connectors provide secure and efficient electrical connections in demanding conditions.