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 configurations including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility for different applications. The connectors, compliant with military specification MIL-DTL-38999 II, come in aluminum shells with options for plating finishes such as gold, electroless nickel, and cadmium-free coatings. Utilizing M39029 rear release crimp contacts, they ensure reliable connectivity, with a service rating of M for rigorous military use. Suitable for wall mounting installations, these connectors guarantee performance and durability in demanding conditions, making them ideal for aerospace, defense, and industrial applications.