High security fastener
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United States of America Patent
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Jun 27, 2017
Issued Date -
N/A
app pub date -
Oct 9, 2014
filing date -
Oct 9, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A security fastener for installation on a wheel having a recess hole extending from a recess entrance of a first diameter comprising an end portion concentric with a longitudinal axis of the fastener, the end portion configured to mate with a corresponding element of the recess hole, an intermediate skirt portion having a side wall region with a diameter within about 6 millimeters of the diameter of the recess entrance, a drive portion having a tapered outer surface and a plurality of circumferentially spaced longitudinally extending key-receiving grooves in the tapered outer surface arranged in a lock pattern to which a driving torque may be applied, the tapered outer surface sloping downward and outward away from the longitudinal axis of the fastener from a top surface to the skirt portion at a taper angle of at least 11 degrees.
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