Patent No. EP3921552 (titled "Blind Fastener And Method Of Installation Thereof") was filed by Howmet Aerospace on Feb 7, 2019. The application was issued on Mar 26, 2025.
Blind fastener for structural components comprising a sleeve with a cavity and a mandrel with an enlarged head, pull region, and shank. The enlarged head is inserted into the cavity, and the pull region is engaged by an installation tool. The tool is used to deform the sleeve and swage the second end onto the shank, securing the fastener in place.

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