US PATENT SUBCLASS 411 / 932
.~.~.~ Oppositely threaded

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

924  DF  COUPLED NUT AND BOLT {13}
929  DF  .~ Thread lock {12}
931  DF  .~.~ Superposed nuts {1}
932.~.~.~ Oppositely threaded {1}
933  DF  .~.~.~.~> Key or pawl locked {1}

DEFINITION

Classification: 411/932

Oppositely threaded:

Art collection under art collection 931 in which one nut has a right hand thread and the other nut has a left hand thread and the threads cooperating with a similarly threaded bolt.