US PATENT SUBCLASS 411 / 418
.~.~.~ By longitudinal slot

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

378  DF  EXTERNALLY THREADED FASTENER ELEMENT, E.G., BOLT, SCREW, ETC. {16}
411  DF  .~ Thread or shank structure {7}
417  DF  .~.~ Circumferentially interrupted thread {2}
418.~.~.~ By longitudinal slot {2}
419  DF  .~.~.~.~> Shank bifurcated by slot extending entirely therethrough
420  DF  .~.~.~.~> Inclined slot {1}

DEFINITION

Classification: 411/418

By longitudinal slot:

(under subclass 417) Subject matter wherein the discontinuity which causes the ridge interruption comprises a relatively narrow groove extending axially of the fastening means.