The MIL-DTL-38999 Series I connectors feature up to 128 contacts, offering durability in harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they come in front wall mount, rear wall mount, and jam nut receptacles, all sealed for environmental protection. These connectors utilize M39029 rear release crimp contacts, with options for RoHS certified finishes including cadmium-free plating. Constructed with high-strength aluminum shells, they ensure reliable connectivity in demanding applications, meeting military specification MIL-DTL-38999 I.