MIL-DTL-38999 Series II connectors feature up to 128 contacts in environmentally sealed inserts, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Offering various mounting options like front wall, rear wall, jam nut, and box mount receptacles, they ensure versatility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and offering plating options like cadmium and nickel, they guarantee durability and performance. With RoHS compliance options, these connectors are ideal for military and industrial applications requiring secure electrical connections in demanding settings.