MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These environmentally sealed connectors have a wide operating temperature range from -65 °C to 200 °C. 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 different plating finishes, ensuring durability and reliability. Utilizing M39029 rear release crimp contacts, they provide secure connections in applications requiring high performance. Meeting military specification MIL-DTL-38999 II, these circular connectors are ideal for demanding aerospace and defense applications.