Which specification outlines the requirements for flat washers?

The requirements for flat washers are outlined in ASTM F436. This specification specifically details the dimensions, material properties, and performance criteria for flat washers that are used with structural fasteners. It ensures that washers meet the necessary standards to function properly in conjunction with bolts and nuts, providing the required load distribution and enhancing joint integrity.

While other standards like AISC Guidelines provide comprehensive guidelines for steel construction and ASTM A490 governs high-strength bolts, they do not specifically focus on the requirements for flat washers. ISO 4014 standards pertain primarily to the dimensions of hexagon nuts, bolts, and screws, which also do not cover flat washers directly. Therefore, ASTM F436 is the appropriate reference for the specifications related to flat washers.