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. Available in various configurations including front wall mount, rear wall mount, and jam nut receptacles, they offer reliable RFI grounding. With 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells, they come with a choice of plating options such as cadmium and nickel finishes. RoHS certified alternatives are also available, ensuring compliance with environmental standards. Suited for military and industrial applications, these connectors provide durability and performance in demanding conditions.