MIL-DTL-38999 Series I connectors boast a maximum of 128 contacts within their inserts, providing robust connectivity for harsh environments. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, these connectors offer versatility in installation. With nine shell sizes and 52 insert arrangements available, they accommodate various configurations. Utilizing M39029 rear-release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options, these connectors ensure secure connections. Constructed with high-strength aluminum shells and offered in various plating options such as cadmium and nickel, they guarantee durability and reliability. With RoHS certified cadmium-free finishes available, they meet environmental standards without compromising performance. Operating within a wide temperature range from -65°C to 200°C, these MIL-DTL-38999 I connectors are ideal for demanding applications. (220 words)