US PATENT SUBCLASS 411 / 431
.~.~ Resiliently retained

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

427  DF  INTERNALLY THREADED FASTENER ELEMENT, E.G., NUT, ETC. {5}
429  DF  .~ Having cap {2}
431.~.~ Resiliently retained

DEFINITION

Classification: 411/431

Resiliently retained:

(under subclass 429) Subject matter wherein the enclosing means or fastener element is structured to, or is composed of, or provided with means of elastic material tending to return to its normal shape when distorted thereby securing the enclosing means and fastener element.