MIL-DTL-38999 Series II connectors feature up to 128 contacts within an environmentally sealed insert, designed for robust performance in harsh environments. With an impressive operating temperature range from -65°C to 200°C, these connectors offer reliable connectivity in extreme conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse application needs. The connectors come in nine shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Crafted from aluminum, they boast plating options such as cadmium, electroless nickel, and anodized aluminum, with RoHS-certified finishes available. Ideal for military and industrial use, these connectors ensure secure and durable electrical connections, with a mating life of 500 cycles and high conductivity.