MIL-DTL-38999 Series II connectors are designed for harsh environments, offering secure connectivity with up to 128 contacts in an insert. These environmentally sealed connectors have a wide operating temperature range of -65 °C to 200 °C, ensuring reliability in extreme conditions. Featuring various mounting options including front wall mount, rear wall mount, and jam nut receptacles, they provide flexibility for different applications. With a choice of straight, RFI grounding, and standard plugs, as well as 52 insert arrangements, these connectors offer versatile solutions. Made of durable aluminum with plating options such as electroless nickel and cadmium finishes, they meet stringent military specifications for performance and durability. Suited for demanding environments, these connectors are ideal for aerospace, defense, and industrial applications.