Specifically, stem 419 is moving axially but not rotating {TAIL ~ so stem male threads} 436 do not engage with {HEAD ~ braze body female threads} 443 
Specifically , stem 419 is moving axially but not rotating { TAIL ~ so stem male threads } 436 do not engage with { HEAD ~ braze body female threads } 443
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH