MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for rugged applications with an operating temperature range of -65°C to 200°C. This versatile connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements available, they accommodate various connection needs using M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, these connectors come in plated options such as cadmium and nickel, offering durability and reliable conductivity. RoHS compliant finishes are also available, catering to diverse environmental regulations. Suitable for military and industrial use, MIL-DTL-38999 Series I connectors ensure secure and efficient electrical connections in harsh environments.