US PATENT SUBCLASS 411 / 958
.~.~.~ Coiled 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}
956  DF  .~ Automatic base clutch {4}
957  DF  .~.~ Biting tooth {2}
958.~.~.~ Coiled washer

DEFINITION

Classification: 411/958

Coiled washer:

Art collection under art collection 957 wherein the projections are carried by a washer which is not a closed annulus, surrounding the bolt shank.