Self-clinching fasteners require two features to properly secure themselves to a metal pane

Self-clinching fasteners require two features to properly secure themselves to a metal panel: an undercut and displacers that move material into the undercut.

Thread leakage will cause the self-clinching nuts fasteners to be installed loosely, easily loosen, or even fall off. ‌ This is because thread leakage means that the connection between the self-clinching nuts fasteners and the sheet metal does not form an effective threaded connection, resulting in poor riveting and failure to achieve the expected fastening effect. ‌ Through testing, potential quality problems can be discovered and solved in advance to avoid product failure during use, thereby reducing maintenance costs and downtime.

In crucial application areas such as automobiles and aviation, the testing of self-clinching nuts fasteners can ensure their connection strength and corrosion resistance, thereby improving the safety of the overall structure.

During installation, the knurls are the first feature to touch the panel's outer surface. They must move material out of the way for the barrel to sit entirely on the panel. The material is guided into the undercut using the proper installation equipment and force. Post-installation, the shank will have to displace the material again to fall out of the panel, which requires troops similar to those associated with installation.

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