US PATENT SUBCLASS 411 / 386
.~ Pilot end having means enhancing fastening or installation

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}
386.~ Pilot end having means enhancing fastening or installation {1}
387.1  DD  .~.~> Drill-tip-type end {5}

DEFINITION

Classification: 411/386

Pilot end having means enhancing fastening or installation:

(under subclass 378) Subject matter wherein the fastening means is provided with means either for penetrating the material, substructure or other work to be fastened or allowing the fastening means to be torqued at an insertion end.