The head is shaped to define a channel for receiving {TAIL ~ an exposed margin} or flange of a hinge mount to rigidly engage {HEAD ~ the hinge} 
The head is shaped to define a channel for receiving { TAIL ~ an exposed margin } or flange of a hinge mount to rigidly engage { HEAD ~ the hinge }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD