Removable fastener capable of elastic deformation

A fastener adapted to be inserted through a hole defined within an object to be fastened and from which it can be removed, comprising:

• a body having an axis, a lateral wall parallel with said axis and a substantially air-tight central cavity;
• a flanged head at one end of said body having a hole through which said cavity communicates with outside said body and a first annular substantially plane surface perpendicular to said axis;
• and
• a least one wall portion having an inner side bounding a segment of said cavity and an outer side along the lateral wall of the body with a second substantially plane annular surface, wherein said wall portion is resiliently movable, from (i) a first position in which said second annular surface is parallel to and faces said first annular surface, to (ii) a second position when said cavity is connected to an external vacuum source, in which said second annular surface is moved toward the axis of the body so as to be no longer parallel with said first annular surface;
• wherein, said first and second annular surfaces bound between them an operable jaw by means of which the fastener, after having been inserted in said hole when said movable wall portion is in said second position, can be fastened to said object when said movable wall portion is brought to said first position.