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