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. These connectors come in various configurations, including front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connectivity. Constructed with high-strength aluminum shells, they offer multiple plating options such as cadmium and nickel for corrosion resistance. These RoHS certified connectors are ideal for demanding military and industrial applications.