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 and rear wall mount as well as jam nut receptacles, with RFI grounding plugs available. Offered in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, they come in plating options like cadmium and nickel, with RoHS certified finishes. Suitable for military and industrial applications, these connectors ensure reliable connectivity in demanding conditions.