MIL-DTL-38999 Series I connectors offer a durable solution for harsh environments, featuring up to 128 contacts within an environmentally sealed insert. With an impressive operating temperature range of -65°C to 200°C, these connectors are ideal for demanding applications. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options. Constructed with high-strength aluminum shells, they come with a choice of plating finishes such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS-certified cadmium-free options available. The MIL-DTL-38999 I connector family includes front and rear wall mount receptacles, jam nut receptacles, and RFI grounding plugs, all designed for reliable performance in challenging environments.