The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts and environmental sealing. With an operating temperature range of -65 °C to 200 °C, they offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in aluminum shells with multiple plating options, including cadmium-free finishes. The connectors, compliant with MIL-DTL-38999 I specifications, include wall mount, rear mount, and jam nut receptacles, as well as RFI grounding plugs. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Suitable for military and industrial applications, these connectors are durable, with gold-plated contacts and a bayonet coupling for easy mating. The connectors' construction and design make them ideal for environments where reliability is crucial.