Metric DIN 557 regular pattern square nuts are four sided nuts. Their geometry provides a greater surface area to apply higher torque when tightening and also a greater surface are in contact with the part being fastened, thereby increasing the resistance to loosening. DIN557 square nuts are high-quality fasteners designed for use in a variety of industrial applications. Made from premium grade steel, these nuts are extremely durable and long-lasting, ensuring a secure fit every time. With their square shape and standard sized threads, these nuts are ideal for use with bolts and other threaded fasteners. They are commonly used in construction and engineering projects, as well as in the automotive and electrical industries. Additionally, these nuts are easy to install and provide excellent torque resistance, making them a must-have for any industrial project.