MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mount types including front wall, rear wall, and jam nut receptacles, they offer RFI grounding plugs for reliable performance. With 9 shell sizes and 52 insert arrangements utilizing M39029 rear release crimp contacts, these connectors are versatile. Constructed with high-strength aluminum shells and offered in different plating options, such as cadmium-free finishes, they meet stringent military specifications. Ideal for applications requiring durability and environmental sealing, these connectors ensure secure electrical connections in demanding settings.