Cap nuts, also known as acorn nuts or dome nuts, are a type of nut that has a domed or rounded top, resembling the shape of an acorn. These nuts are designed to cover the exposed end of a bolt or threaded rod, providing a finished and aesthetically pleasing appearance while also offering some protection to the threads. The dome-shaped top helps prevent accidental contact with the threads and reduces the risk of injuries.

Cap nuts are commonly used in applications where both functionality and appearance are important, such as in furniture assembly, automotive applications, and various construction projects. They come in different materials, including steel, stainless steel, brass, and nylon, depending on the specific requirements of the application. The threading of cap nuts is matched to the threading of the corresponding bolt or threaded rod they are intended to be used with.

It’s worth noting that cap nuts are not intended for high-stress applications and are primarily used for their decorative and protective features. If high strength is required, other types of nuts, such as hex nuts or lock nuts, may be more suitable.