MIL-DTL-38999 Series II connectors are designed for rugged environments, offering up to 128 contacts in an insert with environmental sealing. Operating between -65°C and 200°C, these connectors are versatile. Featuring various mounting options like front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. Available in 9 shell sizes and 52 insert arrangements, they use M39029 crimp contacts. Made of aluminum, they come with plating options including cadmium and nickel. With RoHS compliant finishes, these connectors ensure reliable performance in demanding applications.