The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert and environmental sealing for reliable performance. With an operating temperature range of -65 °C to 200 °C, these connectors are suitable for a wide range of applications. Available in various mounting styles, 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 finishes, such as cadmium and nickel, meeting different standards including RoHS compliance. With M39029 rear release crimp contacts and a variety of insert arrangements, they ensure secure and efficient connectivity. Ideal for military and industrial use, these connectors provide durable and high-quality electrical connections in demanding environments.