| 摘要 |
An expansion bolt assembly includes an anchor bolt with a conically shaped expansion head at one end arranged to be drawn into an expansion sleeve. At the opposite end, the anchor bolt forms a plurality of axially extending projections protruding radially outwardly from the anchor bolt shank. The axially extending projections are spaced circumferentially apart around the anchor bolt and the outer surface of the projections are threaded to receive a nut. The anchor bolt can be produced in an extrusion process with great material economy.
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