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