MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range of -65 °C to 200 °C. These harsh environment thin-walled connectors come in various mounting options like front wall, rear wall, jam nut, and box mounts. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. Crafted from aluminum, with plating options such as gold, electroless nickel, and anodized finishes, they ensure durability and performance in demanding applications. Compliant with military specification MIL-DTL-38999 II, these connectors are ideal for aerospace, defense, and industrial uses requiring rugged, high-performance connectivity.