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