MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for rugged applications with an operating temperature range of -65°C to 200°C. This connector family includes front and rear wall mount, jam nut receptacles, and RFI grounding plugs, offering versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. Constructed with high-strength aluminum shells, these connectors come with various plating options such as cadmium and nickel for enhanced durability. Meeting military specifications, they are ideal for harsh environments, ensuring secure and durable electrical connections.