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, these connectors offer front and rear wall mount options, as well as jam nut receptacles with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, they ensure secure connections in military and aerospace applications. Constructed with high-strength aluminum shells, they come with a range of plating options including cadmium and nickel finishes. RoHS compliant variants are also available, making them suitable for a wide range of industrial and defense-related uses.