MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, with an operating range from -65 °C to 200 °C. Available in various configurations including front and rear wall mount receptacles and jam nut plugs, these connectors are designed for harsh environments. They come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they offer a choice of plating options, including cadmium-free finishes. Meeting stringent military specifications, these connectors ensure reliable performance in demanding applications.