The MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts and a wide operating temperature range from -65 °C to 200 °C. These connectors come in various mounting options, including front and rear wall mount, jam nut, and box mount receptacles, offering versatility in installation. With 52 insert arrangements available, they use M39029 rear release crimp contacts for secure connections. Made with aluminum shells and offering plating options such as electroless nickel, these connectors ensure durability and reliability in military and industrial applications. RoHS compliant finishes are also available. The straight plug design with EMI/RFI shielding and gold contact plating guarantees optimal performance, making them ideal for demanding environments where connectivity is crucial.