| 摘要 |
The present invention relates to a nut having a loosening prevention function and a forming mold thereof. The spiral shaft of a bolt is firmly thread-coupled to the spiral hole of a nut by tension since some parts of the spiral hole of the nut protrude inward in a state of having self tension when the spiral shaft is thread-coupled to the spiral hole; thereby preventing the nut from being arbitrarily loosened from the spiral shaft of the bolt even though external vibration is generated during handling, and enabling the bolt and the nut to be reused by loosening the nut from the bolt without damage to the spiral shaft and the spiral hole of the nut when the nut is loosened from the bolt. The nut has the spiral hole arranged at the center so that the bolt can penetrate in a state where the spiral shaft of the bolt is thread-coupled and having a hexagonal outer surface. Recessed groove parts are vertically recessed inward from the middle of each surface of the nut to the top to have a thin thickness (t). Fastening tension parts having a push tension piece are curved inward in a state of having self tension to firmly hold the spiral shaft by pressing inward the thin thickness parts through the recessed groove parts. |
