Insert nuts are fastening components designed to provide durable internal threads in soft materials such as wood, plastics, or composites. Unlike standard nuts, they are embedded directly into the base material, offering a permanent and secure threaded connection. Their outer body often features knurling, ridges, or slots, which lock the nut firmly in place and prevent it from rotating or pulling out under stress. Insert nuts can be installed by press-fitting, screwing, or even heat-setting, depending on the material and application. They are widely used in furniture assembly, electronics enclosures, and machinery components where reliable screw fastening is needed in otherwise weak materials.