{HEAD ~ The exterior surface} of {TAIL ~ the ferrule} comprises a circumferential ridge and groove that reversibly interacts with a spring inside the adapter cavity 
of
{ HEAD ~ The exterior surface } of { TAIL ~ the ferrule } comprises a circumferential ridge and groove that reversibly interacts with a spring inside the adapter cavity
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH