This ensures that when {TAIL ~ nut} 23 is rotated in {HEAD ~ a first direction} , valve stem threads 436 can not mate with braze body internal threads 61 
This ensures that when { TAIL ~ nut } 23 is rotated in { HEAD ~ a first direction } , valve stem threads 436 can not mate with braze body internal threads 61
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH