Structural Washers are hardened washers manufactured to ASTM F436 for high-strength bolting assemblies, offering the durability and load-bearing reliability required for structural steel connections, anchor rods, and other critical applications. Standard Flat Washers, by comparison, are general-purpose washers used to distribute load and protect surfaces in everyday fastening, typically produced in USS and SAE patterns and available in a variety of non-hardened materials and finishes for light to medium-duty applications. Also available in Stainless Steel.