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