MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range of -65°C to 200°C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, catering to diverse installation needs. With 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes, including coax and twinax options. Constructed with high strength aluminum shells, these connectors come with a choice of plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. RoHS certified finishes are available, ensuring compliance with environmental regulations. Designed for durability, they offer reliable performance in harsh environments, making them ideal for military and industrial applications.