MIL-DTL-38999 Series II connectors offer reliable performance in harsh environments with up to 128 contacts and environmental sealing. Designed for temperatures ranging from -65 °C to 200 °C, these connectors feature various mounting options such as front and rear wall mount, jam nut, and box mount receptacles. Available in aluminum shells with multiple plating options, including RoHS certified finishes, they ensure durability and longevity. With a variety of insert arrangements and contact sizes, these connectors, known for their bayonet coupling, are suitable for diverse applications requiring secure and efficient electrical connections.