types of nuts In most fastening structures, nuts are typically installed externally. However, there is one exception: when the thread needs to be embedded inside the material. This is where insert nuts come into use. If you have encountered any of the following issues: Plastic parts strip after a few uses Threads in aluminum parts break Screws become looser the more they are tightened Structures become unstable after repeated assembly and disassembly In most cases, the issue