The MIL-DTL-38999 Series II connectors, designed for harsh environments, offer reliable connectivity with up to 128 contacts in an insert. Featuring a wide operating temperature range from -65°C to 200°C, these environmentally sealed connectors come in various configurations 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 secure connections. Constructed with aluminum shells and offering multiple plating options including cadmium and nickel, these connectors ensure durability and performance in demanding applications. RoHS compliant finishes are also available, making them suitable for a range of industrial and military uses.