MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. Operating between -65 °C and 200 °C, these connectors offer reliability in extreme conditions. Available in various mounting styles, including front and rear wall mount, jam nut, and box mount receptacles, they provide versatility for different applications. With options for straight, RFI grounding, and standard plugs, along with 52 insert arrangements, these connectors ensure optimal connectivity. Constructed with aluminum shells and plated in finishes such as electroless nickel, they meet stringent military specifications. Suitable for use in demanding settings, these connectors guarantee secure and efficient electrical connections.