A heterogeneous cluster framework for computationally heavy visualizations

A T nut has a cap portion 45 integrally formed continuous from a tip end portion of a flarable portion 34. At a connecting region between flarable portion 34 and cap portion 45, an inner surface 44 of flarable portion 34 is formed recessed outward. With this structure, the T nut can be driven cleanly directly into a solid workpiece object, without the necessity of providing a receiving hole in advance. Also with this structure, a caulking force applied by a caulking counter tool to the tip end portion of the T nut separates the cap portion from the flarable portion and outwardly caulks and flares the flarable portion to secure the T nut to the workpiece.