MIL-DTL-38999 Series I connectors feature up to 128 environmentally sealed contacts in various insert arrangements, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in wall mount and jam nut receptacles, they offer RFI grounding options and utilize M39029 rear release crimp contacts. Constructed with high strength aluminum shells, these connectors come in multiple plating options including electroless nickel and cadmium finishes, with RoHS certified cadmium-free alternatives. Ideal for military and industrial applications, they ensure reliable performance in demanding conditions.