MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65 °C and 200 °C, these connectors offer versatility in harsh conditions. Available in various mounting options such as front wall mount, rear wall mount, jam nut, and box mount receptacles, they cater to different installation needs. With options for straight, RFI grounding, and standard plugs, including a 90-degree cable clamp, these connectors come in 9 shell sizes and 52 insert arrangements, accommodating a range of configurations. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Constructed with aluminum shells and offering plating choices like cadmium and nickel, these connectors provide durability and corrosion resistance. Suitable for military and industrial applications, they meet stringent performance standards for reliability.