MIL-DTL-38999 Series II connectors are designed for demanding environments, featuring up to 128 contacts in an insert with environmental sealing. Operating efficiently in temperatures ranging from -65 °C to 200 °C, these connectors offer versatility with various mounting options such as front and rear wall mount, jam nut, and box mount receptacles. Available in aluminum shells, they come in different plating options including cadmium and electroless nickel. Utilizing M39029 rear release crimp contacts, they ensure reliable connections. With a bayonet coupling and gold plating, these connectors have a maximum operating temperature of 175 °C, making them ideal for military and industrial applications.