Quick view M18 Flat Washers, DIN 125 Type B / ISO 7090, Steel The nominal diameter is the bolt size to use for this flat washer.Diameter (Nominal): M18Inside Diameter (Nominal): 19mmOutside Diameter (Nominal): 34mmThickness (Nominal): 3mmProduct Class: WashersOrder: Flat WashersCategory: Standard Flat... $212.12 Select Quantity Compare