MIL-DTL-38999 Series I connectors are rugged and reliable, featuring up to 128 contacts in an insert for extensive connectivity. Designed for harsh environments, these connectors offer environmental sealing and operate efficiently in temperatures ranging from -65 °C to 200 °C. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, with options for RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with high strength aluminum shells, these connectors come in various plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes. Suitable for military and industrial applications, these connectors are ideal for demanding environments requiring durable and efficient electrical connections.