The inner periphery of {HEAD ~ the washer bites} into {TAIL ~ the shank} to prevent it from dislodging 
into
The inner periphery of { HEAD ~ the washer bites } into { TAIL ~ the shank } to prevent it from dislodging
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH