MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in a sealed insert. With an operating temperature range of -65°C to 200°C, they offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for different plating finishes, including RoHS-certified cadmium-free coatings. Ideal for military and aerospace applications, they meet stringent standards for durability and reliability. The connectors are compatible with M39029 rear release crimp contacts and offer options for front wall mount, rear wall mount, and jam nut receptacles, ensuring versatility in installation. With gold-plated contacts and a bayonet coupling design, they provide secure and efficient connectivity for critical systems.