Patent ID: 8851813

Claim:
A rivet for joining parts of a workpiece defining a hole when the rivet is pulled by a tool to set the rivet by applying a predetermined tensile load thereto, the rivet comprising: a rivet body including a first shank defining an axial bore therethrough, the first shank having a first end and a second end, and a flange is located at the first end of the first shank, the rivet body adapted to be inserted into the hole in the workpiece such that the flange abuts the workpiece when the first shank is inserted into the hole in the workpiece; a mandrel including a head, with an abutment portion for abutting the second end of the first shank, and a second shank adapted to extend through the axial bore and to be pulled by the tool, and the second shank has a first reduced diameter portion adapted to break at the predetermined tensile load, and wherein the second shank further includes at least one protrusion adjacent said abutment portion for defining a recess for receiving the first end of the first shank during setting of the rivet; and wherein the at least one protrusion has an inclined surface at an angle greater than 20° from the longitudinal axis of the rivet.