MIL-DTL-38999 Series II connectors are designed for rugged environments, offering up to 128 contacts in a single insert. With environmental sealing and a wide operating temperature range from -65 °C to 200 °C, they ensure reliable performance in harsh conditions. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, these connectors are versatile in their applications. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Crafted from aluminum, they come in different plating options including cadmium-free finishes, meeting RoHS compliance standards. These connectors, with gold-plated contact pins, are ideal for military and industrial use, providing durability and conductivity in demanding settings.