MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front and rear wall mount, jam nut receptacles, and RFI grounding plugs. Constructed with high-strength aluminum shells, these connectors come in plating options like cadmium and nickel, with RoHS certified finishes. Utilizing M39029 rear release crimp contacts, they ensure reliable connectivity in demanding applications, making them ideal for military and aerospace use.