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 configurations, including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility for different applications. The connectors come in 9 shell sizes and 52 insert arrangements, with M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and offering multiple plating options, including cadmium and nickel, they ensure durability and performance. With RoHS compliant finishes available, these connectors guarantee quality and reliability for military and industrial use.