MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, they offer reliable performance in harsh conditions. These connectors come in various configurations such as front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating options like gold, electroless nickel, and cadmium-free finishes, they ensure durability and corrosion resistance. Meeting military specification MIL-DTL-38999 II, these connectors guarantee high-quality connectivity for demanding applications.