MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert with environmental sealing. Operating within a wide temperature range from -65 °C to 200 °C, these connectors offer versatility for various applications. Available in different mounting styles such as front wall, rear wall, jam nut, and box mount receptacles, they cater to diverse installation requirements. With options for straight, RFI grounding, and standard plugs, as well as multiple shell sizes and insert arrangements, these connectors provide flexibility in design. Utilizing M39029 rear release crimp contacts, they ensure secure and reliable connections. Constructed with aluminum shells and offering various plating options including cadmium-free finishes, these connectors meet stringent quality standards. Suitable for military and industrial use, they offer durability with 500 mating cycles and environmental resistance.