Device for fastening an add-on part and a support part at a distance from each other

A device for use in securing an add-on part and a support part in mutually spaced-apart relation, said device comprising:

• a mounting nut fixedly connectable to the support part and having an internal thread of a first pitch direction;
• a compensating bush comprising:
• an external thread matable with said internal thread of said mounting nut;
• an inwardly disposed inner sleeve having a head portion with an alternating arrangement of reinforcement zones and adaptation zones, said reinforcement zones having a relatively greater resistance to radially outwardly directed expansion than said adaptation zones, said inner sleeve formed on said bush body on a side of said bush body proximate an abutment plate, said abutment plate disposed at an end of said compensating bush which is directed away from said mounting nut and projecting radially beyond said external thread of said compensating bush, wherein said adaptation zones are each U-shaped, including two side legs and a base segment, said side legs each joined to a respective adjacent reinforcement zone, and said base segment disposed farther radially outwardly than said reinforcement zones;
• and
• a foot portion extending between said head portion and said abutment plate, said foot portion tapering down conically from said abutment plate to said head portion and including a plurality of weakening apertures disposed opposite said adaptation zones in a longitudinal direction;
• and
• a fastening screw having a screw shaft to connect the add-on part to said compensating bush, said screw shaft including an external thread of a second pitch direction opposite to said first pitch direction and being insertable in a screw channel provided in said mounting nut and in said compensating bush, said compensating bush further having a channel portion forming part of said screw channel and having an inner diameter smaller than the outer diameter of said screw shaft.