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 wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, providing versatility in installation. With 9 shell sizes and 52 insert arrangements, they accommodate various contact configurations, utilizing M39029 rear release crimp contacts. Constructed with high-strength aluminum shells and offered in a range of plating options, including RoHS certified finishes, these connectors ensure reliable performance in demanding applications.