MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range from -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various receptacle styles such as front and rear wall mount, jam nut, and box mount, they provide flexibility for different applications. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells and offering a range of plating options, including RoHS certified finishes, these connectors ensure durability and compliance with industry standards. Suitable for military and industrial use, they guarantee secure and efficient electrical connections in demanding settings.