Nut shoulder 25 contacts {HEAD ~ nut} retaining {TAIL ~ ring} 75, housed within valve stem annular valley 448, and axially moves stem 419 away from valve body 15 
retaining
Nut shoulder 25 contacts { HEAD ~ nut } retaining { TAIL ~ ring } 75 , housed within valve stem annular valley 448 , and axially moves stem 419 away from valve body 15
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH