Metric self-tapping locking screw and the manufacturing method thereof
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United States of America Patent
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Aug 20, 2019
Grant Date -
Aug 9, 2018
app pub date -
May 5, 2017
filing date -
Feb 5, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A metric self-tapping locking screw comprises a screw head which is connected to a thread locking body by a screw rod. The thread locking body and the self-tapping tip are provided with a screw thread on the surface. The self-tapping tip is arranged at the root of the thread locking body; the screw thread adopts the basic structure of the standard ordinary triangular thread. The flank angle back to the fastened surface is 15-20° and the flank angle of the screw thread facing the fastened surface is 30°. The metric self-tapping locking screw in the Invention make the installed parts to be fastened have higher axial clamping force and static loosing moment, which solves the attenuation problem of axial clamping force and static moment of fastened parts.
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