Sealing fastener with multiple threads
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United States of America Patent
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Feb 15, 2005
Grant Date -
N/A
app pub date -
Apr 25, 2003
filing date -
Feb 24, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A screw having a primary thread extending along its shank and terminating at the screw head is formed with a supplemental thread extending between adjacent convolutions of the primary thread and also terminating at the head of the screw. The spaced termini of the two threads maintain a washer at the head in a position perpendicular to the axis of the shank of the screw.
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