| 摘要 |
A threaded fastener, such as a screw, includes a head, a tapered tip portion including a pair of opposing lands disposed between a pair of flutes, and a shank that extends between the head and the tapered tip portion. The shank includes a first threaded portion and a second threaded portion. The first threaded portion of the shank extends along a portion of the shank and at least a portion of the tip portion. The second threaded portion of the shank extends along a portion of the shank between the head and the first threaded portion.
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