The MIL-DTL-38999 Series II connectors, designed for harsh environments, feature a thin-walled construction with up to 128 contacts. These environmentally sealed connectors, operating between -65°C and 200°C, offer versatility with various mounting options including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and offering multiple plating options, including RoHS certified finishes, these connectors ensure durability and performance in demanding applications. Perfect for military and industrial use, they provide secure and efficient electrical connections in rugged conditions.