MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. These environmentally sealed connectors have an operating temperature range of -65 °C to 200 °C, ensuring reliable performance in extreme conditions. Utilizing M39029 rear release crimp contacts in various sizes, including coax and twinax, they offer flexibility for different applications. With high-strength aluminum shells and a variety of plating options such as cadmium-free finishes, including RoHS certified options, these connectors are durable and compliant with environmental standards. Suitable for military and industrial use, they provide secure and efficient connectivity in demanding situations.