The MIL-DTL-38999 Series II connectors feature up to 128 contacts housed in an insert, providing robust connectivity in harsh environments. With a wide operating temperature range of -65°C to 200°C, these environmentally sealed connectors offer reliable performance. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse application needs. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and offering plating options such as cadmium and nickel, they ensure durability and corrosion resistance. These connectors, compliant with military specification MIL-DTL-38999 II, are ideal for demanding military and aerospace applications.