The MIL-DTL-38999 Series I connectors feature up to 128 contacts enclosed in a sealed insert, designed for harsh environments with an operating range from -65°C to 200°C. Offering versatility, they come in front wall mount, rear wall mount, and jam nut receptacle options with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, they can be plated with options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, including RoHS-certified cadmium-free finishes. Ideal for military and industrial applications, these connectors ensure reliable performance with their durable construction and conductive contact design, meeting stringent environmental standards for connectivity in demanding conditions.