Abstract: A blind rivet formed with a tubular shell, and a mandrel extending through the shell. The shell has an outwardly extending flange at one end forming a rivet head, and having a first set of radial indentations arranged around the periphery of the shell at a first distance from the rivet head, and a second set of radial indentations arranged around the periphery of the shell at a second distance from the rivet head. Each of the radial indentations are formed by crimping them in the rivet shell after the shell has been positioned around the mandrel with the end of the shell remote from the rivet head defining the blind end of the rivet shell. Lastly, the mandrel having a head formed at one end to abut against the blind end of the shell, and the stem extending from the head having a point of weakness part way along the length thereof disposed within the shell.