Riveting apparatus

A riveting yoke assembly comprises a yoke, a force applying mechanism and a rivet forming device. The yoke has a first end, a second end, and a middle section coupled between the first and second ends. An opening is formed through the yoke between the first and second ends. The force applying mechanism is coupled to the first end of the yoke. The lower rivet forming device is removably coupled to the second end of the yoke. The lower rivet forming device has a base end attached to the second end of the yoke and a forming end with a recess to form rivets. The recess has a concave, interior surface having an annular step positioned between a top edge of the interior surface and a bottom-most point of the interior surface in order to properly align the rivet.