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