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 versatility for different applications. These connectors come in high-strength aluminum shells with options for plating, including cadmium-free finishes. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, they ensure reliable connections with sizes 22D, 22M, 22, 20, 16, and 8 for coax and twinax contacts. Ideal for military and aerospace use, they meet MIL-DTL-38999 I specifications for rugged performance in demanding environments.