MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts within an insert. These connectors offer reliable performance in extreme conditions, with an operating temperature range of -65 °C to 200 °C. Available in various mounting styles, including front and rear wall mount, jam nut, and box mount receptacles, they provide versatility for different applications. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Constructed with aluminum shells and offering multiple plating options, such as cadmium-free finishes, they ensure durability and compliance with RoHS regulations. Suitable for military and industrial use, these connectors provide secure and efficient electrical connections.