MIL-DTL-38999 Series II connectors feature up to 128 contacts, offering robust environmental sealing and a wide operating temperature range from -65°C to 200°C. These connectors, compliant with military specification MIL-DTL-38999 II, come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and offering multiple plating options including gold, electroless nickel, and cadmium-free finishes, these connectors are ideal for harsh environments. The straight plug design with EMI/RFI shielding and bayonet coupling ensures secure connections, making them suitable for diverse applications requiring durability and performance.