MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. These connectors, including front and rear wall mount options, jam nut, and box mount receptacles, offer versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells, various plating options like electroless nickel and cadmium finishes ensure durability. With RoHS certified options, these connectors are ideal for military and industrial applications requiring rugged performance in challenging conditions.