MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. With front wall mount, rear wall mount, and jam nut receptacles, they offer versatility in connectivity. Utilizing M39029 rear release crimp contacts in various sizes, including coax and twinax, these connectors ensure reliable performance. Constructed with high-strength aluminum shells and available in different plating options such as cadmium and electroless nickel, they meet stringent military specifications. RoHS compliant finishes are also offered, making them suitable for a range of applications requiring durable and secure electrical connections.