MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with a wide operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer versatility with front wall mount, rear wall mount, and jam nut receptacles. These connectors, compliant with military specification MIL-DTL-38999 I, utilize M39029 rear release crimp contacts for secure connections. Crafted from high-strength aluminum, they come with a selection of plating options including cadmium-free finishes, ensuring durability and reliability in demanding applications.