MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in an insert, designed for harsh environments. Featuring front wall mount, rear wall mount, and jam nut receptacles, these connectors are ideal for military and aerospace applications. With an operating temperature range from -65 °C to 200 °C, they ensure reliable performance in extreme conditions. Made from high-strength aluminum shells, they come in various plating options including cadmium-free finishes for RoHS compliance. The connectors use M39029 rear release crimp contacts in different sizes, providing flexibility in design. Suitable for circular plugs, they guarantee secure and durable connections, meeting stringent military specifications for reliability and performance.