MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors are environmentally sealed, with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. The high-strength aluminum shells come in different plating options including cadmium finishes and electroless nickel. Offering reliable performance, these connectors are ideal for military and industrial applications requiring durability and conductivity.