MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are ideal for demanding applications. Available in various mounting styles such as front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles, they offer flexibility in installation. The connectors, made of aluminum, come in different plating options including electroless nickel and cadmium finishes. With RoHS certified cadmium-free options, they ensure compliance with environmental regulations. These connectors, with gold-plated contacts and a bayonet coupling, provide reliable and secure connections, suitable for military and industrial use.