MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert with front and rear wall mount options. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Utilizing M39029 rear release crimp contacts, they ensure secure connections in sizes 22D, 22M, 22, 20, 16, and 8. The high-strength aluminum shells are available in various plating options, including cadmium-free finishes, catering to different application needs. Meeting military specification MIL-DTL-38999 I, these circular receptacles guarantee reliable performance with features like bayonet coupling, gold contact plating, and electroless nickel coating. Suitable for demanding environments, they offer connectivity with durability and efficiency.