The MIL-DTL-38999 Series II connectors boast high-performance features ideal for harsh environments, with a wide operating temperature range of -65 °C to 200 °C. These circular connectors offer up to 128 contacts in various insert arrangements, including front and rear wall mount, jam nut, and box mount receptacles. With options for straight, RFI grounding, and 90-degree cable clamp plugs, they cater to diverse connectivity needs. Constructed with aluminum shells and available in RoHS-compliant finishes like electroless nickel and cadmium olive drab, these connectors ensure durability and reliability. Designed for military specifications, they meet stringent standards for environmental resistance, making them suitable for demanding applications.