US PATENT SUBCLASS 411 / 928
.~.~ Thread gripper

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}
926  DF  .~ Positive lock {2}
928.~.~ Thread gripper

DEFINITION

Classification: 411/928

Thread Gripper:

Art collection under art collection 925 in which the stop is locked to the bolt by its gripping action on the bolt

threads.