Abstract: Wall rack apparatus comprises a frame bent from a tube or rod to have at least one inverted U-shaped opening into which is received portions of a mounting member. A flange on the mounting member and at least one key formed on the mounting member, and a corresponding keyway or keyways formed into the frame adjacent the inverted U-shaped opening, non-rotatably retain the frame and mounting member together when the mounting member is attached, as with screws, to a mounting surface. A recess is formed into U-mounting member, the mounting screws being installed through the bottom of the recess. A cap is provided for plugging the recess, a detent being provided to releasably retain the cap in the recess.