DIN 603 is a standard that specifies the requirements for carriage bolts. These bolts are characterized by their round, domed heads and square necks, which prevent them from turning when tightened. The DIN 603 standard ensures that these bolts are manufactured to precise dimensions and have the necessary strength and durability for their intended applications. Carriage bolts are commonly used in woodworking and construction projects, where their smooth heads and decorative appearance make them suitable for visible applications. They are also known for their ease of installation, as they can be tightened from one side without the need for a wrench on the opposite side. DIN 603 sets the guidelines for the design, dimensions, materials, and testing of these bolts, ensuring that they meet the required quality standards.