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