MIL-DTL-38999 Series II connectors offer robust performance with up to 128 contacts in an insert, ensuring reliable connectivity in harsh environments. Featuring a wide operating temperature range from -65 °C to 200 °C, these connectors are environmentally sealed for protection. Available in various mounting options such as front wall mount, rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. With options for straight, RFI grounding, and standard plugs, along with multiple shell sizes and insert arrangements, these connectors provide versatility in design. Utilizing M39029 rear release crimp contacts, they offer secure and efficient connections. Constructed with aluminum shells and plated with options including electroless nickel and cadmium finishes, they meet stringent quality standards. Their bayonet coupling mechanism ensures easy and secure mating, making them ideal for military and industrial applications requiring durability and performance in demanding environments.