Patent ID: 8769790

Claim:
A die for shaping a self-pierce rivet, comprising: a one piece anvil that is disposed along an axis and includes: a first portion that has a first perimeter surface; a second portion that is coaxially disposed with the first portion, the second portion having an end surface and a second perimeter surface that extends from the end surface; and a flange portion having an upper surface and a lower surface disposed opposite the upper surface, wherein the upper and lower surfaces extend from the first and second perimeter surfaces, respectively, and away from the axis; and a collar fixedly disposed on the anvil, the collar having an interior surface, an exterior surface disposed opposite the interior surface, and a mating surface that extends from the interior surface to the exterior surface; wherein the interior surface of the collar engages the second perimeter surface and the mating surface of the collar engages the upper surface of the flange portion.