A connector for use in displays of the type including a screen frame formed of a plurality of beams which are joined together by connectors node multiway to form a three dimensional shape, and which has display panels releasably secured to beams, the connector comprising: a male part (3) having a bearing face (11), a stem (8) projecting from the bearing face and head (9) comprises four spikes (10) which projecting laterally from the stem (8); and female part (2) having a wall (30) with an inner face and a face of external support, the wall containing an opening (33) of cruciform shape which allows the head of the male pass part through the opening when the male part is in a first orientation and receiving rod rotatably with the bearing face of the male contact face outer support wall, the inner side wall (30) that is profiled to engage the tips when the male part is rotated within the opening; characterized in that the opposite faces of the wall (30) and points (10) are provided with ramps inclined oppositely (19) acting to provide progressive tightening and alignment of the connector while the bearing face (11) and the stem (8 ) and the tips (10) of the male part are rotated together, in use, in any direction from the first orientation to a second orientation, coupling to engage the female part.
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