Stainless steel cap nuts, also known as acorn nuts, are threaded fasteners with a closed dome-shaped top and internal threads. They mate with bolts to achieve fastening while covering the exposed bolt end for protection and decoration.
Made of 304 or 316 stainless steel, these cap nuts feature outstanding rust and corrosion resistance, suitable for outdoor and humid environments. The rounded closed cap can shield the bolt thread from dust, moisture and impact, and also eliminate sharp exposed bolt ends to improve safety. They combine fastening function with neat appearance, widely used in furniture, railings, equipment frames and decorative mechanical assemblies.