MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, offering versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts. The connectors come in high-strength aluminum shells with various plating options, including light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to different application needs. RoHS certified cadmium-free finishes are also available. Suitable for military and industrial applications, these connectors provide reliable performance with gold-plated contacts, ensuring durability and conductivity.