MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65°C to 200°C, these connectors are environmentally sealed for reliable performance. Available in various mounting types such as front wall, rear wall, jam nut, and box mount receptacles, they offer flexibility in installation. The connectors come in aluminum shells with options for plating including gold, electroless nickel, and cadmium finishes. Utilizing M39029 rear release crimp contacts, they ensure secure connections. With a mating type of bayonet coupling, these connectors are suitable for military and industrial applications requiring durability and high performance in challenging conditions.