The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With operating temperatures ranging from -65°C to 200°C, these environmentally sealed connectors offer reliable performance. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse application needs. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells and offering different plating options such as gold and electroless nickel, they ensure durability and corrosion resistance. Compliant with military specification MIL-DTL-38999 II, these connectors are ideal for demanding industrial and military environments.