US PATENT SUBCLASS 411 / 388
.~ Double-ended

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}
388.~ Double-ended {1}
389  DF  .~.~> Both ends threaded

DEFINITION

Classification: 411/388

Double-ended:

(under subclass 378) Subject matter wherein the fastening

means is provided with two distinct end configurations one of which is threaded.

(1) Note. The fastener elements of this subclass usually have a boss or similar driving structure between the end configurations.

SEE OR SEARCH THIS CLASS, SUBCLASS:

479, for impact driven hollow or dowel type fasteners.