MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with operating temperatures ranging from -65°C to 200°C. Available in various mount types such as front wall, rear wall, jam nut, and box mount receptacles, they offer versatility in connectivity solutions. The connectors come in aluminum shells with plating options including light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to diverse application requirements. Compliant with RoHS standards, they ensure reliable performance with removable crimp contacts, bayonet coupling, and conductivity for up to 500 mating cycles. Suitable for military and industrial applications, these Series II connectors provide a durable and secure connection solution in demanding environments.