component 10 the surface of this collar which defines its central opening abutting the periphery of component 10 more specifically collar 14 comprises two or more segments each of these segments being formed with flange portions 16a 16b spaced apart longitudinally of the central axis of the collar which central axis coincides with the longitudinal axis 12 of component 10 and therefore will be designated by the same reference number hereinafter the sides of the flange portions 16a 16b lie in planes perpendicular to the central axis 12 of the collar and each segment of the collar is provided with two end walls 18 that extend between and are integrally joined to the flange portions each wall 18 is formed with an aperture not illustrated and the shank of a bolt 20 extends through the apertures in confronting end walls 18 of the two segments of the collar a conical type washer or series of washers 22 referred to hereinafter as the belleville spring s is disposed between an end wall 18 of one of the segments of the collar and the nut 24 associated with each bolt 20 if desired rings 26 28 may be mounted on component 10.