MIL-DTL-38999 Series II connectors feature up to 128 contacts within an environmentally sealed insert, designed for optimal performance in harsh conditions. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliability in extreme environments. Available in various mount types including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation 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 electroless nickel and cadmium finishes, they ensure durability and corrosion resistance. The MIL-DTL-38999 II connectors, compliant with RoHS regulations, are ideal for military and industrial applications requiring high-performance circular connectivity.