MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, offering environmental sealing and an operating temperature range of -65 °C to 200 °C. Designed for harsh environments, they come in various configurations including front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles. Available in aluminum shells with plating options such as electroless nickel and iridescent yellow cadmium, these connectors ensure reliable performance. Utilizing M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12, they guarantee secure connections. With a bayonet coupling, they are suitable for military and industrial applications, meeting stringent standards for durability and functionality.