MIL-DTL-38999 Series I connectors offer rugged durability with up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Featuring front wall mount, rear wall mount, and jam nut receptacles, these connectors ensure secure connections. They come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with high-strength aluminum shells and available in various plating options including cadmium-free finishes, like electroless nickel, these connectors meet RoHS compliance. Perfect for military and industrial applications, they guarantee reliable performance in demanding conditions.