The MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts within an insert for robust connectivity. With an operating temperature range from -65 °C to 200 °C, these connectors are ideal for harsh conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The connectors come in aluminum shells with options for plating, such as cadmium and nickel, meeting diverse application needs. Utilizing M39029 rear release crimp contacts, they ensure secure connections. RoHS compliant finishes are also available, making them environmentally friendly. These connectors, with their durable construction and reliable performance, are suitable for military, aerospace, and industrial applications requiring high-quality electrical connectivity in demanding environments.