MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. Available in front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs and use M39029 rear release crimp contacts. With 9 shell sizes and 52 insert arrangements, these connectors are versatile and durable. Made of high-strength aluminum, they come in various plating options including cadmium-free finishes, ensuring reliability and performance in demanding applications.