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 from -65°C to 200°C. Available in various mounting styles including front and rear wall mount, and jam nut receptacles, they offer RFI grounding plugs for enhanced performance. With 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, accommodating a range of applications. Constructed with high-strength aluminum shells, they come with plating options such as cadmium and nickel, meeting RoHS compliance standards. Ideal for military and aerospace applications, these connectors ensure reliable connectivity in demanding environments.