MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting styles like front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The plugs, including straight and 90-degree cable clamp options, come in 9 shell sizes with 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells, they offer durability, with plating options such as electroless nickel and cadmium finishes. These connectors, compliant with military specification MIL-DTL-38999 II, ensure reliable performance in demanding applications.