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The dsi resin assisted nos.5, 6 and 7 tandem anchor bolts use a design that emphasizes the slit in its shell and chamfer on the nut.As the tandem anchor is rotated and loaded, the plug pushes the shell down over the chamfered nut.Without the silt and chamfered nut, the shell shatters due to the extreme forces the plug applies to the leaves.
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