The 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, they offer versatility in installation. These connectors are environmentally sealed, with an operating temperature range from -65°C to 200°C. Constructed with high strength aluminum shells, they ensure durability. Available in various plating options including cadmium-free finishes, they meet RoHS certification standards. Utilizing M39029 rear release crimp contacts, in sizes 22D, 22M, 22, 20, 16, and 8, these connectors guarantee reliable performance. The bayonet coupling and gold contact plating enhance connectivity, while the socket contact style and conductive conductivity ensure efficient signal transmission. Suitable for military applications, these connectors have a service rating of M and a mating life of 500 cycles, making them ideal for demanding environments.