MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts in an insert and environmental sealing. Operating at temperatures ranging from -65 °C to 200 °C, they offer reliable performance in extreme conditions. Available in various mounting options, including front and rear wall mount, jam nut, and box mount receptacles, these connectors feature durable aluminum shells with plating options such as cadmium and nickel. With gold-plated contacts and a bayonet coupling, they ensure secure and efficient electrical connections. Meeting military specification MIL-DTL-38999 II, these connectors are ideal for aerospace, defense, and other demanding applications.