MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert. These environmentally sealed connectors operate reliably in temperatures ranging from -65 °C to 200 °C. Featuring various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility for different applications. Available in aluminum shells with options for plating such as cadmium and nickel, these connectors ensure durability. Utilizing M39029 rear release crimp contacts, they guarantee secure connections. With a service rating of M and conductive conductivity, they meet stringent military standards for reliability. The RoHS compliant finishes cater to environmental regulations, making them a trusted choice for aerospace, defense, and industrial applications.