Device for fastening an element to another element such as the bodywork of a motor vehicle

In combination with a first element and a second element having a hole through it, a selectively tightened and untightened fastening device comprising:

• a fastener carrying the first element and having a body defining a shank extending through the hole, with means coaxial with said shank for defining an annular and radial thrust surface;
• a nut engaged on said shank, said nut having an annular gripping face for axially compressing the fastening device;
• an axially compressible and deformable shock absorbing bush interposed between said thrust surface and said gripping face for axial compression between said thrust and gripping faces when the device is tightened;
• a gripping ring interposed between said gripping face of said nut and said shock absorbing bush, and having a face oriented towards said shock absorbing bush;
• and an axial gripping spacer member disposed axially between said thrust surface and said gripping ring, at least a portion of said spacer member being within said bush to control the compression thereof, a chamfered element on said shock absorbing bush face of said gripping ring for guiding said deformation of said bush as said bush is compressed when the device is tightened, wherein the outer dimensions of the nut and the untightened bush are smaller than the corresponding dimensions of the second element hole.