MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for reliable connectivity. The connectors come in high strength aluminum shells with options for plating, including cadmium-free finishes. Offering front and rear wall mount as well as jam nut receptacles, they are ideal for military and aerospace applications requiring durability and performance.