Parker FET Series hydraulic quick-connect couplings are designed for use in high-pressure, high-impulse applications requiring threaded connections and the ability to connect and disconnect under residual pressure. A nonspill valve and visual connection indicator show a secure connection. These couplings are used with on-shore drilling and oil field equipment, high-impulse mobile circuits, and excavator attachments. Couplings are interchangeable with similar European-style thread-to-connect couplings.