Square nuts are a type of nut with a square shape rather than the more common hexagonal shape. They are used in various applications where a secure and stable fastening is required. The square shape of these nuts provides some advantages, such as preventing rotation when tightened, which can be particularly useful in certain situations.

Square nuts are often used in conjunction with square-headed bolts or machine screws. The square shape helps them stay in place and resist loosening due to vibrations or torque. These nuts are commonly found in woodworking, automotive, and machinery applications.

It’s important to note that square nuts are not as widespread as hexagonal nuts, and their usage may depend on specific requirements or preferences in a given application.