The MIL-DTL-38999 Series II connectors are designed for harsh environments with up to 128 contacts in an insert. Featuring a wide operating temperature range of -65 °C to 200 °C, these connectors are environmentally sealed for reliable performance. Available in various configurations including front and rear wall mounts, jam nuts, and box mounts, they offer versatility in installation. With options for straight, RFI grounding, and standard plugs, as well as different shell sizes and insert arrangements, these connectors accommodate diverse needs. Constructed with aluminum shells and offering plating choices like electroless nickel and cadmium finishes, they ensure durability and corrosion resistance. Meeting MIL-DTL-38999 II military specifications, these connectors provide secure and efficient connectivity in demanding applications.