Square Weld Nuts are four-sided nuts with a square body, featuring welding projections—typically one at each corner—designed for secure attachment through spot welding. Also referred to as square projection weld nuts, they are ideal for permanent fastening solutions in structural and industrial applications.

These nuts are available in both metric and imperial sizes, and support thread standards such as UNC (Unified National Coarse), UNF (Unified National Fine), UN (Unified National Fixed), and ISO metric threads. They are manufactured from a variety of materials and adhere to ASTM specifications.

Explore this page to learn more about the manufacturing process, forming methods, available types and sizes, thread configurations, as well as details on dimension standards, weight charts, torque specifications, material grades, and more.