MIL-DTL-38999 Series II connectors, designed for harsh environments, offer robust performance with up to 128 contacts in an insert. These front wall mount, rear wall mount, jam nut, and box mount receptacles are sealed for environmental protection, ensuring reliable operation in temperatures ranging from -65°C to 200°C. Available in 9 shell sizes and 52 insert arrangements, they feature removable crimp contacts and various plating options, including gold. Constructed with aluminum shells, these connectors meet military specification MIL-DTL-38999 II standards, making them ideal for demanding applications where durability and performance are essential.