MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. With options for straight, RFI grounding, and standard plugs, these connectors come in 9 shell sizes and 52 insert arrangements, using M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating choices like cadmium or nickel, they ensure durability and performance. These connectors, complying with military specification MIL-DTL-38999 II, are ideal for applications requiring reliable electrical connections in demanding conditions.