MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors are environmentally sealed, with a wide operating temperature range from -65°C to 200°C. Available in various mounting styles such as front wall mount, rear wall mount, jam nut, and more, they offer flexibility for different applications. With 52 insert arrangements and utilizing M39029 rear release crimp contacts, they ensure reliable connectivity. The aluminum shells come in different plating options, including cadmium-free finishes. Meeting military specifications, these connectors are ideal for demanding industrial and aerospace applications.