MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in an insert, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. Featuring front wall mount, rear wall mount, and jam nut receptacles, they ensure secure connections in various applications. These connectors, compliant with military specification MIL-DTL-38999 I, boast high-strength aluminum shells and are available in nine shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts, they guarantee reliable performance, with options for gold plated contacts for enhanced conductivity. With various plating options, including cadmium-free finishes, such as electroless nickel and black anodized aluminum, they cater to diverse environmental requirements. Ideal for military and aerospace applications, these connectors meet stringent standards for durability and performance.