Fastening arrangement for shelving system or the like

In a shelving system or the like, a combination comprising:

• (a) a columnar post, which has a front wall and a lateral flange extending from the front wall and merging with the front wall along a curved corner of the columnar post, the curved corner defining a concavely curved bearing surface, the front wall having an aperture bounded by a margin;
• (b) an outer plate, which is adapted to be removably fastened to the front wall, and which has an aperture bounded by a margin, similar to the aperture of the front wall, and adapted to overlie the aperture of the front wall when the outer plate is disposed for being fastened to the front wall;
• (c) means for fastening the outer plate removably to the front wall, said means including:
• (1) a bolt having a threaded shank and a transverse head, which is integral with the threaded shank, the transverse head having two opposite portions and being smaller than the aperture in the outer plate and smaller than the aperture in the front wall, the bolt being adapted to be successively inserted through the aperture of the outer plate with the head preceding the shank, inserted through the aperture of the front wall with the head preceding the shank, rotated about the threaded shank in a given rotational sense in relation to the columnar post, and drawn outwardly until the transverse head bears against the curved corner where the lateral flange merges with the front wall so as to prevent further rotation of the bolt in the same rotational sense, the apertures being shaped so as to allow substantially straight-through insertion of the bolt axially in relation to the threaded shank with the head preceding the shank, one of said two opposite portions of the transverse head having a convexly curved bearing surface conformed to the concavely curved bearing surface defined by said corner so as to bear in surface-to-surface contact with said concavely curved bearing surface, the transverse head being adapted to bear at the opposite portions against the margin of the aperture in the front wall, on opposite sides of the aperture in the front wall, when the bolt is drawn outwardly, so as to prevent axial withdrawal of the bolt;
• and
• (2) a fastener, which is threadable onto the threaded shank, and which is adapted to draw the bolt outwardly, when the fastener is threaded onto the threaded shank, until the fastener bears against the margin of the aperture of the outer plate.