MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Utilizing M39029 rear release crimp contacts, they offer reliable connectivity in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells and available in various plating options, including cadmium-free finishes, they ensure durability and performance. Suitable for military applications, these connectors are ideal for back panel box mounting with a bayonet coupling, meeting stringent MIL-DTL-38999 I specifications.