MIL-DTL-38999 Series I connectors offer reliable performance in harsh environments with up to 128 contacts housed in an insert. These circular connectors feature front wall mount, rear wall mount, and jam nut receptacles, providing versatility in installation. Compliant with military specification MIL-DTL-38999 I, they ensure durability and ruggedness, with an operating temperature range of -65°C to 200°C. Utilizing M39029 rear release crimp contacts, these connectors are available in various shell sizes and insert arrangements, accommodating different connection needs. The high strength aluminum shells come with multiple plating options, including electroless nickel and cadmium finishes. With RoHS certified cadmium-free options, they meet environmental standards while offering superior conductivity and ingress protection. Ideal for applications requiring secure and efficient electrical connections, these connectors are designed for demanding environments, ensuring reliable performance in critical operations.