MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, offered in 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts, these connectors come in high-strength aluminum shells with various plating options such as cadmium and nickel. With RoHS certified finishes available, they ensure reliable connectivity for military and industrial applications.