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, with an operating temperature range spanning from -65°C to 200°C. The high-strength aluminum shells come in a variety of plating options, including cadmium-free finishes, such as electroless nickel and olive drab cadmium. Utilizing M39029 rear release crimp contacts, they ensure secure connections in sizes 22D, 22M, 22, 20, 16, and 8 (coax and twinax). Meeting MIL-DTL-38999 I military specifications, these connectors provide reliable performance with gold-plated removable crimp contacts and bayonet coupling. Suitable for a wide range of applications, they offer exceptional conductivity, with a service life of 500 cycles and ingress protection for demanding environments.