MIL-DTL-38999 Series II connectors are designed for rugged environments, offering up to 128 contacts in a sealed insert. With an operating temperature range from -65 °C to 200 °C, these connectors ensure reliable performance in extreme conditions. Available in various configurations such as front and rear wall mount, jam nut, and box mount receptacles, they provide versatility for different applications. The connectors feature durable aluminum shells with options for plating finishes including cadmium-free and electroless nickel. Utilizing M39029 rear release crimp contacts, they guarantee secure connections. With a mating type of bayonet and a service rating of I, these connectors are ideal for military and aerospace use.