| 摘要 |
A fastener includes an elongated shank having a head formed at the first end of the shank, where the head has an outer surface and the head extends radially outwardly. The fastener also includes at least one helical thread portion extending along at least a portion of the shank and a substrate gripping portion extending along at least a portion of the shank between the head and the at least one helical thread portion. The substrate gripping portion includes at least one gripping member extending radially outwardly from the longitudinal axis.
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