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