The cap 16 further has {HEAD ~ a second portion} defining {TAIL ~ a small cylindrical cavity} 32 concentric to the large female cylindrical cavity 28 and depending downwardly in an axial direction 
defining
The cap 16 further has { HEAD ~ a second portion } defining { TAIL ~ a small cylindrical cavity } 32 concentric to the large female cylindrical cavity 28 and depending downwardly in an axial direction
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH