A joint between a fluid connector body (42) and a metal tube (46) carrying a plastic outer layer is formed by spin welding, wherein the portion of the connector body which is configured to receive the tube defines an end surface which engages the outer plastic surface of the mating tube to create a circumferentially continuous seal between the fluid passageway in the connector body and the outside environment. A radially inward extending flange (76) in the connector body extends into the interior passage at a position spaced from an end opening in the connector body which receives the metal tube. The flange acts as an insertion limiter for the metal tube.