Square Nuts are four-sided fasteners with internal threading at the center, commonly paired with square-headed bolts, though they can be used with other bolt types as well. The square shape offers a larger surface contact area, but generally allows for lower torque compared to standard hex nuts. These nuts are also referred to as four-sided nuts or square body nuts.

They are available in both metric and imperial dimensions, supporting thread profiles such as UNC (Unified National Coarse), UNF (Unified National Fine), UN (Unified National Fixed), and ISO metric threads. Square nuts are manufactured in a variety of materials and comply with multiple ASTM standards.

Explore further to learn more about the manufacturing methods, forming processes, size availability, thread types, subcategories, dimension standards, torque specifications, weight data, and material grades.