The 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 of -65 °C to 200 °C, these connectors offer reliability in extreme conditions. Available in various mounting styles such as front wall, rear wall, jam nut, and box mount receptacles, they cater to diverse installation needs. With options for straight, RFI grounding, and standard plugs, as well as multiple shell sizes and insert arrangements, these connectors ensure compatibility with various systems. Constructed with aluminum shells and offering plating options like cadmium and nickel, they meet stringent military specifications for durability. The MS27474 - Connectors, Receptacle, Electrical, Jam Nut Mounting, Crimp Type, Bayonet Coupling, 38999 Series II connectors are ideal for applications requiring secure and high-performance electrical connections.