MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front and rear wall mount options, along with jam nut receptacles and RFI grounding plugs. These connectors utilize M39029 rear release crimp contacts, with plating options including cadmium-free finishes. Constructed with high-strength aluminum shells, they ensure durability and reliability in demanding applications, meeting stringent military specifications for performance and quality.