Patent ID: 7303366

Claim:
A three piece blind fastener, configured to be inserted into an opening defined in a workpiece, the workpiece having a first surface, the fastener comprising: a mandrel; and an elongate tubular body portion and a radially extending flange, wherein said body portion is mounted on an elongate stem of said mandrel so as to extend co-axially about a central axis of said blind fastener and said mandrel having a mandrel head in operative engagement with a tail end of said body portion for transmitting force thereto during setting of said fastener, said radially extending flange defines an inner aperture and is separate from said body portion, said flange being held in crimped engagement with said body portion at or towards a front end of said body portion so as to be axially remote from said tail end, wherein said flange contacts said first surface of said workpiece and is configured to bear against said workpiece so said flange will not pull through said opening and wherein said body portion partitions said flange from said mandrel to prevent contact between said flange and said mandrel, wherein said flange is crimped between two radially deformed portions of said tubular body portion, said radially deformed portions having a greater external diameter than the body, wherein said flange comprises an inner aperture for receiving said tubular body portion, said aperture having at least two diametrically opposed and inwardly facing side edges for restraining engagement between said two radially deformed portions of said body portion, wherein said flange is tubular having an inwardly extending circumferential rim disposed partway along an axial length thereof, said rim defining said side edges of said aperture.