MIL-DTL-38999 Series I connectors offer up to 128 contacts in an environmentally sealed insert, built for extreme conditions with an operating temperature range of -65 °C to 200 °C. Featuring front and rear wall mount options, jam nut receptacles, and RFI grounding plugs, this connector family is versatile. With 9 shell sizes and 52 insert arrangements available, it uses M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells, these connectors come in various plating options including cadmium-free finishes. Designed to meet military specifications, they ensure reliable performance in demanding environments.