MIL-DTL-38999 Series I connectors boast up to 128 contacts in an insert, offering robust environmental sealing and a wide operating temperature range from -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 various installation needs. With 9 shell sizes and 52 insert arrangements available, they accommodate M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options. Featuring high-strength aluminum shells with plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, these connectors are designed for durability in demanding environments. Additionally, RoHS certified cadmium-free finishes are offered, ensuring compliance with environmental regulations.