Abstract: Means for interconnecting adjacent panels of partitioning comprising a flanged member adapted to be secured to or formed integral with the vertical edges of each panel, each flanged member being provided with one or more flanges which mate with corresponding flanges of the flanged member of an adjacent panel to prevent separation of the adjacent panels along the line of the panels, each flanged member also being provided with an open longitudinal channel adapted to abut with a similar open longitudinal channel on the flanged member on the adjacent panel to define a closed channel when in the mating position and a locking strip adapted for engagement in the closed channel to prevent separation of the flanged members in a direction substantially at right angles to the line of the panels.