| 摘要 |
A thermoformed thermoplastic panel has three V-shaped protrusions which extend into engagement with the ramped depressions within a truck tailgate to automatically align the upper edge of the panel with the rail cap of the tailgate. The panel forms a protective cover for the tailgate and is held in place by screws having large, wide, flat heads which overlie the upper surface of the cover. The screws have shanks which have a nonthreaded portion adjacent to the head and a tapered, threaded portion at the end. The screws are tightened to bring the tailgate cover upper edge adjacent to the tailgate cap.
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