MIL-DTL-38999 Series II connectors offer robust connectivity with up to 128 contacts, featuring environmental sealing and a wide operating temperature range of -65 °C to 200 °C. These connectors, available in various styles such as front and rear wall mount, jam nut, and box mount receptacles, are designed for harsh environments. With options for straight, RFI grounding, and standard plugs, along with 9 shell sizes and 52 insert arrangements, they provide versatility in applications. Utilizing M39029 rear release crimp contacts, these connectors ensure reliable connections. Constructed with aluminum shells and offering plating options like cadmium and nickel, they meet stringent quality standards. Suitable for military and industrial use, these connectors are built to withstand demanding conditions.