The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert and offering reliable performance in extreme temperatures ranging from -65°C to 200°C. These circular connectors come in various configurations such as front and rear wall mount, jam nut, and box mount receptacles, with options for straight, RFI grounding, and 90-degree cable clamp plugs. Compliant with military specification MIL-DTL-38999 II, they ensure durability and performance in demanding applications. Made of aluminum with multiple plating options including electroless nickel and cadmium olive drab, these connectors guarantee corrosion resistance. Equipped with removable crimp contacts, they provide easy installation and maintenance. With a service rating of I and a service class of E, these connectors are suitable for environment-resistant box and through bulkhead mounting receptacle types. Meeting stringent quality standards, they offer reliable connectivity in critical military and industrial settings.