The opposite end of the side section terminates in a free edge, {HEAD ~ flare} or flange which contacts the circumferential edge of {TAIL ~ the nut insert} 
The opposite end of the side section terminates in a free edge , { HEAD ~ flare } or flange which contacts the circumferential edge of { TAIL ~ the nut insert }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL