Abstract: A fastening device to join together panels comprises a body (12) that has a spreader (32); a U-shaped spring (14) with arms (47, 48) provided with outward facing gripping portions (47", 48") protruding from the body and drawn together in a resting position; a cam-type operating element (18) rotatable in the body. By rotating the cam element, the spring is movable between a resting position with the arms close to each other, in which it leaves the panels free and an engagement position with the arms spread apart, in which it engages the walls of a hole in a panel, and vice versa. The body (12) has an elongated cylindrical shape and comprises an internal housing (26). A slide element (16) is received inside the housing, is moveable for an axial distance along it, and has a housing (44) for engaging the spring. The cam element (18) is received in the body and in the slide to operate the movement of the slide between the resting position of the spring and the working position of the spring and vice versa.

Abstract: A fitting for a piece of furniture is provided with at least one separate dowel, which is inserted into a hole of a furniture part. An expansion member is positioned within the dowel. The expansion member is connected to a lever with an eccentric cam by an axle. The dowel is pressed against a plate like part of the fitting. When the dowel is in an expanded position, the lever is situated in a recess of the plate like part. The recess is in the form of a slot. The dowel is positioned at one end of the slot and the plate like part has a casing at the same end of the slot. The expansion member protrudes through a bottom plate of the casing and the axle is situated within the casing so that the dowel abuts the bottom plate of the casing.