{HEAD ~ A metallic bolt} is fixed to {TAIL ~ the two flanges} and extends generally perpendicularly therebetween 
is fixed to
{ HEAD ~ A metallic bolt } is fixed to { TAIL ~ the two flanges } and extends generally perpendicularly therebetween
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH