US PATENT SUBCLASS 411 / 400
.~ Hook head, e.g., J-bolt, etc.

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}
400.~ Hook head, e.g., J-bolt, etc.

DEFINITION

Classification: 411/400

Hook head, e.g., J-bolt, etc.:

(under subclass 378) Subject matter wherein the fastening means is provided with a head defining an arcuately formed extension on its shank.

SEE OR SEARCH THIS CLASS, SUBCLASS:

485, for a hook head impact driven fastener.