MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert and offering front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles. With operating temperatures ranging from -65 °C to 200 °C, they ensure reliable performance in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts, offering versatility in connectivity. Constructed with aluminum shells and various plating options, including RoHS certified finishes, they guarantee durability and compliance. Suitable for military and industrial applications, these connectors provide secure and efficient electrical connections in demanding settings.