MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. This connector family includes front and rear wall mount, as well as jam nut receptacles and RFI grounding plugs, offering versatility in applications. With 9 shell sizes and 52 insert arrangements available, they utilize M39029 rear release crimp contacts for secure connections. The connectors come in high-strength aluminum shells with various plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. These connectors are designed for durability, meeting MIL-DTL-38999 I specifications and offering reliable performance in demanding conditions.