The MIL-DTL-38999 Series II connectors are ideal for harsh environments, offering up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are designed for durability. Available in various configurations such as front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility for different installation needs. Featuring aluminum shells with options for plating such as gold, electroless nickel, and cadmium-free finishes, they ensure reliable conductivity. Utilizing M39029 rear release crimp contacts, these connectors guarantee secure connections. With a service rating of M and resistance to environmental factors, they are suitable for demanding applications in military, aerospace, and industrial settings.