Overview
ISO 7089 is a dimensional standard for normal series metric plain washers used in industrial, mechanical, and commercial fastening applications. It defines key dimensional characteristics such as inside diameter, outside diameter, thickness, and product grade requirements to support fastening compatibility and load distribution. The standard is commonly referenced together with material, coating, and mechanical fastening standards depending on the application requirements. ISO 7089 washers are commonly available in carbon steel, stainless steel, alloy steel, and corrosion-resistant coated finishes. When sourcing ISO 7089 washers, the standard alone may not fully define the product requirements. Additional specifications may include material grade, hardness requirements, coating system, and certification requirements.