The MIL-DTL-38999 Series II connectors offer high-performance connectivity for demanding environments. With up to 128 contacts housed in a rugged insert, these connectors are designed to withstand extreme temperatures ranging from -65°C to 200°C. Featuring various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they provide versatility for different applications. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and offering multiple plating options, including cadmium-free finishes, they ensure durability and compliance with RoHS regulations. Ideal for military and aerospace applications, these connectors guarantee secure and efficient electrical connections in harsh environments.