MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various receptacle types including front and rear wall mount, they offer RFI grounding options. With 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high strength aluminum shells, they come in plating options such as cadmium and nickel, meeting RoHS compliance standards. Ideal for military applications, these connectors ensure reliable performance with features like bayonet coupling and environmental resistance.