MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert and operating temperatures ranging from -65°C to 200°C. These environmentally sealed connectors offer various mounting options, including front wall mount, rear wall mount, and jam nut receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. With aluminum shells and plating options like electroless nickel and cadmium finishes, these connectors ensure durability. Meeting military specification MIL-DTL-38999 II, they are ideal for applications requiring rugged, high-performance connectivity in demanding conditions.