A Square Nut is a type of nut with a square shape, designed to be used with bolts or screws to secure two or more parts together. The square design provides greater surface contact and can offer more stability compared to a round nut, particularly when used with a square hole or in applications where the nut needs to resist rotation. ... Square nuts are typically used in situations where a secure, firm connection is needed, and where the additional surface area of the square shape can help distribute the load evenly. These nuts are commonly made from materials like steel, stainless steel, or brass and are used in applications such as machinery, construction, and metalworking. Read Less