Patent ID: 6428255
Filing Date: 2002-08-06
Classification: F16B

Abstract:
A blind rivet comprising:a. a body having a generally cylindrical shank, a radial flange formed at one end of the shank and a bore which extends axially through the flange and through at least part of the length of a shank; and b. a mandrel comprising a mandrel head located adjacent an end of the bore remote from the flange, the diameter of the head being larger than the diameter of the bore, a stem attached to the mandrel head which passes through the length of the bore and extends beyond the flange and which comprises a breakneck located on the stem, wherein the mandrel comprises a plurality of indentations formed around the stem adjacent to the mandrel head which taper partway along the stem within the shank in a direction away from the head, characterized in that the shape of the cross-section of the stem at the point where the indentations are formed is substantially square.