FIG 4 is {HEAD ~ a perspective view} of a washer to be used in {TAIL ~ conformity} with the invention 
to be used in
FIG 4 is { HEAD ~ a perspective view } of a washer to be used in { TAIL ~ conformity } with the invention
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH