The dampener 10 has {TAIL ~ a nut} 12 mounted at one axial end for tightening {HEAD ~ the dampener} 10 onto the threaded end of the shaft 
The dampener 10 has { TAIL ~ a nut } 12 mounted at one axial end for tightening { HEAD ~ the dampener } 10 onto the threaded end of the shaft
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH