The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are ideal for demanding applications. Available in various configurations such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing reliable M39029 rear release crimp contacts. Constructed with aluminum shells and offered in different plating options including cadmium and electroless nickel, they ensure durability and corrosion resistance. Meeting military specifications, these connectors guarantee high-performance in rugged conditions.