MIL-DTL-38999 Series I connectors, designed for harsh environments, feature up to 128 contacts in an insert with options for front and rear wall mount as well as jam nut receptacles. These environmentally sealed connectors have a wide operating temperature range from -65 °C to 200 °C, making them suitable for various applications. Utilizing M39029 rear release crimp contacts in multiple sizes, including coax and twinax, they offer versatility in connectivity. Available in 9 shell sizes and 52 insert arrangements, these connectors come in high strength aluminum shells with various plating options, such as electroless nickel and cadmium finishes. RoHS certified options are also available, ensuring compliance with environmental regulations. Suitable for military and industrial use, these connectors provide reliable and durable performance in demanding conditions.