The retainer is able to secure {TAIL ~ the terminal member} to prevent removal when {HEAD ~ the retainer} is in the fully secured position 
The retainer is able to secure { TAIL ~ the terminal member } to prevent removal when { HEAD ~ the retainer } is in the fully secured position
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH