{HEAD ~ The plug} of {TAIL ~ filler material} fills the hole made by the fastener body when the fastener is driven into a workpiece 
{ HEAD ~ The plug } of { TAIL ~ filler material } fills the hole made by the fastener body when the fastener is driven into a workpiece
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH