MIL-DTL-38999 Series II connectors feature up to 128 contacts housed in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various configurations such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. With 52 insert arrangements and M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12, these connectors ensure secure and reliable connections. Crafted from aluminum, they come with plating options including light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to diverse application needs. RoHS compliant finishes are also available, making them environmentally friendly choices. Ideal for military and industrial use, these connectors guarantee high performance with 500 mating cycles and conductivity.