A heatstake for fastening a workpiece includes a base portion (12) having at least one shaft portion (20, 22). A central passage (26, 30) extends though the shaft portion from its leading end (24, 28) to the base portion. A plurality of slots (32) are disposed about an outer surface (34) of the shaft portion (22). The plurality of slots (32) have a predefined angular separation. Preferably, the plurality of slots (32) disposed about the outer surface of the shaft portion form a heatstake having multiple fastening portions. The multiple fastening portions are adapted to form a geometric flower shape for increasing the fastening strength of a heatstake when staked.