MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert with environmental sealing. Operating between -65 °C and 200 °C, these connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. With options for straight, RFI grounding, and 90-degree cable clamp plugs, they accommodate different installation needs. Featuring aluminum shells with plating options like electroless nickel and RoHS certified finishes, they ensure reliability and durability. Utilizing M39029 rear release crimp contacts, these connectors are ideal for military and industrial applications requiring secure and high-performance electrical connections.