MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environmental conditions with an operating temperature range of -65 °C to 200 °C. These connectors, with various mounting options including front and rear wall mount, jam nut, and box mount receptacles, offer versatility in installation. 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 plating options such as gold, electroless nickel, and cadmium finishes, these connectors ensure durability and performance. With RoHS compliant versions available, they meet international standards for environmental safety. Suitable for military and industrial applications, these MIL-DTL-38999 Series II connectors provide secure and efficient electrical connectivity in demanding environments.