The washer 13 consists of {HEAD ~ a disklike flat portion} 16 for pressing and fixing {TAIL ~ a piece} of covering material in place, and a plurality of leaf spring like projections 15 extending radially inwardly of the flat portion, with a gradual descent to a given length, until they terminate convergently 
for fixing
The washer 13 consists of { HEAD ~ a disklike flat portion } 16 for pressing and fixing { TAIL ~ a piece } of covering material in place , and a plurality of leaf spring like projections 15 extending radially inwardly of the flat portion , with a gradual descent to a given length , until they terminate convergently
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH