[Features]- There are only 2-3 threads at the entrance, and by screwing (pushing) the male screw, this product bites into the threads and tightens. ●It is used for repairing lost nuts regardless of the pitch of the male thread. (If it is for M3, it can also be used for 1/8 inch size.) ●As a nut that can be tightened without tools, it can be tightened by hand or by pushing it in. ● It can also be used as a protective cap for a fastened hexagonal nut, and it is also resistant to vibration, so it can also be used as a part to prevent the nut from falling off. ●Compatible with weight reduction of stainless steel and iron nuts. ●Parts made of resin with excellent weather resistance, chemical resistance, and water resistance. ●Due to the rubber-based resin, it is waterproof and dustproof.