| 摘要 |
1. Expansion fastener comprising a bolt or a pin ended with an expansion cone, an expansion sleeve in whose back part there are longitudinal cuts, and a nut, characterized in that on the external side surface of the expansion taper (2) at least one guidance and expansion element (3) is formed, whose front part is in mesh with the longitudinal cut (5) in the expansion sleeve (6).<IMAGE>
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