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