The MIL-DTL-38999 Series II connectors are designed for tough environments, with up to 128 contacts in a sealed insert. Operating between -65°C and 200°C, they offer reliability in extreme conditions. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse applications. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 crimp contacts for secure connections. Constructed with aluminum shells and offering plating options like gold and electroless nickel, they ensure durability and conductivity. With RoHS compliant finishes available, they meet modern environmental standards, making them ideal for military and industrial use.