MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a rugged insert. These environmentally sealed connectors are designed for harsh environments, with an operating temperature range from -65°C to 200°C. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide versatile installation options. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for reliable connections. Constructed with high strength aluminum shells, they come in various plating options including iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. RoHS compliant finishes are also available. Ideal for military or industrial applications, these connectors ensure secure and durable electrical connections in demanding environments.