- Hex head, female threaded inside. - Hex Nuts, made of 304 Stainless Steel, strong, corrosion resistant and will support all of your projects. - Hexagonal shape has 6 sides that gives a good granularity of angles for a tool to approach from. - Used in conjunction with a mating bolt to fasten two or more parts together. - Suitable for door handles, machinery industry and other small repairs around the shop, garage or home furniture fastener etc.