As {HEAD ~ closure} 12 is screwed onto {TAIL ~ container} 14, annular lower portion 38 will make contact with annular container flange 18 
As { HEAD ~ closure } 12 is screwed onto { TAIL ~ container } 14 , annular lower portion 38 will make contact with annular container flange 18
OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH