a fluid coupling assembly which has a novel female subassembly capable of receiving a male portion , the female subassembly being formed by spin welding two generally cylindrical plastic parts together , one of the parts being a quick connect end portion and the other part being the barb end portion . the female subassembly is provided with a key or keyway to prevent rotation , to mate with a corresponding key or keyway on the male portion to prevent false connections , and to act as a clear visual aid for orientation . in this design differing barb end portions can be secured to a common quick connect end portion .