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