MIL-DTL-38999 Series I connectors are designed for rugged environments, featuring up to 128 contacts in an insert that is environmentally sealed. With an operating temperature range of -65 °C to 200 °C, these connectors ensure reliable performance in harsh conditions. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. The connectors, made with high strength aluminum shells, come with plating options including light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes. Offering front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they meet MIL-DTL-38999 I specifications for military-grade reliability. Perfect for applications requiring durable and secure electrical connections, these connectors are essential for industries where performance in extreme conditions is paramount.