MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert with environmental sealing, designed for a wide operating temperature range from -65 °C to 200 °C. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in harsh environments. With options for straight, RFI grounding, and standard plugs, these connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Constructed with aluminum shells and multiple plating choices, such as gold and electroless nickel, they ensure reliable performance. Meeting MIL-DTL-38999 II military specifications, these connectors are ideal for demanding applications requiring secure and durable electrical connections.