Provided is a wall mounting system including at least one wall mount articulable to a wall, and at least one coupling member; the mounting portion includes two parallelly disposed side walls with a locking portion at a distal end thereof, for snug insertion into the locking slot of the wall mount; and the coupling member is configured with an obstructing plunger slidingly displaceable within a space between side walls, between a locked position, at which the plunger at least partially projects into the first locking recess, and an unlocked position at which the plunger is retracted into the space and out of the first locking recess. Further provided is a tolerance cancelation mechanism for a wall coupling member articulable to a wall mount, including a pivotal fastener member configured with an asymmetric sector-like shape with a wall engaging arc surface for bearing against a wall surface.