MIL-DTL-38999 Series I connectors feature up to 128 environmentally sealed contacts in a robust insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. This connector family offers front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, providing versatility in installation. With 9 shell sizes and 52 insert arrangements available, they accommodate various contact configurations, including M39029 rear release crimp contacts. Constructed with high-strength aluminum shells and offered in different plating options such as cadmium and nickel, these connectors ensure reliable performance in demanding applications. The RoHS compliant versions are also available, meeting environmental regulations. Suitable for military and industrial use, these connectors guarantee secure and durable connectivity in critical systems.