MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts, featuring rugged environmental sealing for reliable operation in harsh conditions. Designed for a wide temperature range from -65 °C to 200 °C, these connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. With options for straight, RFI grounding, and standard plugs, they cater to diverse application needs. Compliant with military specification MIL-DTL-38999 II, these circular connectors ensure durability and robust performance. Crafted from aluminum with a choice of plating finishes, such as electroless nickel, they provide corrosion resistance and longevity. Ideal for demanding environments, these connectors with removable crimp contacts, mating via bayonet coupling, guarantee secure and efficient connectivity. With a service rating of I and a mating life of 500 cycles, they are suitable for critical operations. The connectors also offer potting compatibility, making them versatile for various applications. While they are not RoHS compliant, they meet stringent military standards for performance and reliability.