A dowel for fastening fitting parts of pieces of furniture, including: a dowel sleeve; at least one fastening claw separate from the dowel sleeve; and a spreading element movable axially in the dowel sleeve and intended for radially spreading the at least one fastening claw and the dowel sleeve. The dowel sleeve has a guide which laterally guides a retaining portion of the fastening claw, and a latching element which retains the fastening claw, which is inserted into the guide, on the dowel sleeve, preferably with play. The spreading element can be connected to at least one fastening claw, preferably to all fastening claws.

A fitting part for tool-free fastening in a bore in a panel includes a radially outwardly expandable expansion sleeve for insertion into the bore and a fitting housing, which is mounted in the expansion sleeve so as to be rotatable about an axis of rotation between a starting rotary position and a final rotary position, has a lever arm which is arranged outside the expansion sleeve and has a latching device, and has an expansion contour which is arranged inside the expansion sleeve and, upon rotation of the fitting housing in the expansion direction of rotation from the starting rotary position to the final rotary position, expands the expansion sleeve radially outwards.

A connecting device having a hollow-body-like plug-in part which is of variable outer circumference and which interacts with a fixing device which is at least partially insertable into the plug-in part, wherein the fixing device is connectable to an actuation section which projects out of the plug-in part. Here, the plug-in part, with the fixing device inserted therein and with the actuation section connected thereto, has the minimum external shape thereof in terms of the dimensions thereof when the actuation section is in a rest position. The actuation section is moved by means of axial or radial movement relative to the plug-in part into a working position in which the plug-in part has the maximum external shape thereof in terms of the dimensions thereof, wherein the plug-in part has a closed shape on its side situated opposite the insertion side of the fixing device.

A dowel for fastening fitting parts of pieces of furniture, including: a dowel sleeve; at least one fastening claw separate from the dowel sleeve; and a spreading element movable axially in the dowel sleeve and intended for radially spreading the at least one fastening claw and the dowel sleeve. The dowel sleeve has a guide which laterally guides a retaining portion of the fastening claw, and latching means are provided which retain the fastening claw, which is inserted into the guide, on the dowel sleeve, preferably with play. The spreading element can be connected to at least one fastening claw, preferably to all fastening claws.

A connecting device having a hollow-body-like plug-in part which is of variable outer circumference and which interacts with a fixing device which is at least partially insertable into the plug-in part, wherein the fixing device is connectable to an actuation section which projects out of the plug-in part. Here, the plug-in part, with the fixing device inserted therein and with the actuation section connected thereto, has the minimum external shape thereof in terms of the dimensions thereof when the actuation section is in a rest position. The actuation section is moved by means of axial or radial movement relative to the plug-in part into a working position in which the plug-in part has the maximum external shape thereof in terms of the dimensions thereof, wherein the plug-in part has a closed shape on its side situated opposite the insertion side of the fixing device.

A spreading connector for connecting two furniture parts, including a built-in pot having a pot bottom, the pot being pressable, pot bottom first, into a housing bore of a first of the furniture parts. The pot further has a hollow-cylindrical pot wall that has a wall opening and at least one spreading tab that is cut free in the hollow-cylindrical pot wall and is pivotable about an axis running tangentially to the hollow-cylindrical pot wall. A tightening element is rotatably mounted inside the built-in pot for tightening a fastening bolt of a second of the furniture parts which passes through the wall opening. The tightening element has an outer eccentric surface for spreading the at least one spreading tab. The at least one spreading tab has a free tab end that extends in an axial direction away from the pot bottom.

Connection device for two furniture parts which have to be interconnected, with a first connection portion which is realized at least as a spreading system and which is intended for being provided in a recess in a first furniture part, with a second connection portion which is intended for extending outside of the recess for cooperating with a second furniture part in this manner, as well as an activation mechanism for activating the spreading system, wherein the spreading system comprises at least two mutually rotatable parts, a first part and a second part, respectively, wherein the mutual rotation of which, in function of the realized mutual angle position, effects a spreading effect.