MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for rugged environments with an operating temperature range of -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, these connectors ensure secure connections in various applications. Constructed with high-strength aluminum shells and available in 9 shell sizes and 52 insert arrangements, they provide versatility and durability. Utilizing M39029 rear release crimp contacts, the connectors come in various contact sizes, including coax and twinax options. With plating choices such as cadmium-free finishes, electroless nickel, and anodized aluminum, they meet diverse requirements. The connectors, compliant with MIL-DTL-38999 I specifications, are ideal for military and industrial applications where reliability is paramount.