{HEAD ~ the thrust receiving flange} is held by {TAIL ~ a locknut} screwed into an inner peripheral surface of the second housing through the second housing opening, 
{ HEAD ~ the thrust receiving flange } is held by { TAIL ~ a locknut } screwed into an inner peripheral surface of the second housing through the second housing opening ,
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH