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 and rear wall mount and jam nut receptacles, they offer reliable RFI grounding. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors ensure secure connections. Constructed with high-strength aluminum shells and offering plating options such as iridescent yellow cadmium and electroless nickel, they meet stringent military specifications for durability and performance in demanding applications.