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 shell sizes and insert arrangements, they offer front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors ensure reliable connections. Constructed with high-strength aluminum shells, they come in a range of plating options including cadmium-free finishes. Meeting military specification MIL-DTL-38999 I, these circular receptacles are ideal for applications requiring durability and performance in demanding conditions.