Abstract: A connector is provided for joining hollow elongate frame members, such as tubes, to a support structure such as an other tube. The connector has a base portion with inner and outer faces, the inner face being shaped to conform to the shape of the adjacent surface of the support structure. The connector has at least one spreading mechanism extending outwardly from the base portion and having external transverse dimensions enabling it to be inserted into an end of the elongated frame member. This mechanism has parallel first and second arms located adjacent to each other. A screw is located in a threaded hole extending transversely through the first arm. This screw can be used to push against the second arm and thereby spread the arms apart. The base portion can have a hole formed therein to receive an elongate fastener used to connect it to the support structure. In a preferred embodiment, the second arm is divided into two parallel prongs separated by a narrow slit.