MIL-DTL-38999 Series I connectors offer durable and reliable performance in harsh environments, featuring up to 128 contacts sealed for environmental protection. With an operating temperature range from -65 °C to 200 °C, these connectors are suited for demanding applications. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts in different sizes, including coax and twinax options. Constructed with high-strength aluminum shells, they come in a range of plating options such as cadmium and nickel finishes. RoHS compliant versions are also available. The connectors, including front and rear wall mount receptacles, as well as jam nut receptacles, are designed for easy installation and support bayonet coupling. Suitable for military and industrial use, these connectors ensure secure and efficient electrical connections in critical operations.