MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering robust environmental sealing and an impressive operating temperature range of -65 °C to 200 °C. This harsh environment connector family includes front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs. With 9 shell sizes and 52 insert arrangements available, these connectors utilize M39029 rear release crimp contacts in various sizes, ensuring versatility. Constructed with high-strength aluminum shells, they come plated in options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS-certified cadmium-free finishes. Whether for military or industrial applications, these connectors, meeting MIL-DTL-38999 I specifications, offer reliable performance in demanding environments.