MIL-DTL-38999 Series I connectors feature up to 128 contacts, offering durable and environmentally sealed connectivity for harsh environments. With an operating temperature range of -65 °C to 200 °C, these connectors are designed for reliability in extreme conditions. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options. The high-strength aluminum shells come with plating choices such as cadmium and nickel, meeting stringent military specifications. Whether in front wall mount, rear wall mount, or jam nut receptacles, these connectors ensure secure and efficient connections, making them ideal for aerospace, defense, and industrial applications.