US PATENT SUBCLASS 411 / 975
.~.~ Rotatable washer

Current as of: June, 1999
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411 /   HD   EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER

955  DF  LOCKED BOLTHEAD OR NUT {7}
974  DF  .~ Side lock {7}
975.~.~ Rotatable washer {2}
976  DF  .~.~.~> Bent tongue-locked
977  DF  .~.~.~> Pawl-locked

DEFINITION

Classification: 411/975

Rotatable washer:

Art collection under art collection 974 having a washer which turns with the device as single piece, the locking action taking place between the washer and the substructure.