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