MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various mounting options, including front and rear wall mount, jam nut, and box mount receptacles, they feature bayonet coupling for secure connections. With 52 insert arrangements and M39029 rear release crimp contacts, they provide flexibility for different applications. Constructed with aluminum shells and plated with options such as electroless nickel and cadmium, they ensure durability and reliable performance. These connectors, compliant with military specification MIL-DTL-38999 II, are ideal for demanding industrial and military settings.