{HEAD ~ A bolt attachment} is attached to the outer surface of the fan case and has a composite boss with {TAIL ~ at least one threaded metallic insert} 
{ HEAD ~ A bolt attachment } is attached to the outer surface of the fan case and has a composite boss with { TAIL ~ at least one threaded metallic insert }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL