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