The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts sealed within their inserts. With an operating temperature range from -65°C to 200°C, these connectors offer reliability in extreme conditions. Available in various mounting options such as front wall, rear wall, and jam nut receptacles, they ensure versatile installation. Utilizing M39029 rear release crimp contacts, these connectors come in 9 shell sizes and 52 insert arrangements, accommodating diverse connectivity needs. Constructed with high-strength aluminum shells and offering multiple plating options including cadmium-free finishes, they meet stringent military specifications. With gold-plated contacts and a bayonet coupling design, they ensure secure and efficient electrical connections. Suitable for applications requiring environmental resistance, these connectors provide reliable performance in demanding situations.