Method for manufacturing fitting including blind nut and tap tool for use in this method

A tap tool for use in a method for manufacturing a fitting including a blind nut,

• wherein said fitting has a configuration that a fitting plate and the blind nut are integrally formed so that said fitting is utilized for hanging a TV main body on a wall, and
• when forming a part of a plate material serving as the fitting plate into a bag-like blind hole by drawing processing and performing tap processing to an internal diameter portion to integrally form a portion corresponding to the blind nut,
• a tap tool having a protrusion at an end thereof is inserted into the bag-like blind hole at a planned part of the blind nut, and then carrying out the tap processing to form a continuous thread in the blind hole,
• thus allowing the protrusion provided at the end of the tap tool to come into contact with an inner wall at an end of the bag-like blind hole, and
• forming, with a material pressed thereby, a convex shape on an outer side of the bag-like blind hole;
• and
• wherein a protrusion is formed at an end of the tap tool to form a convex shape in a product.