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. These connectors come in various configurations such as front wall mount, rear wall mount, and jam nut receptacles, offering versatility in applications. They utilize M39029 rear release crimp contacts and are available in 9 shell sizes and 52 insert arrangements. Constructed with high-strength aluminum shells, they are offered in multiple plating options including cadmium-free finishes. These connectors are MIL-DTL-38999 I compliant, ensuring reliability and performance in demanding environments.