Quick view 1/2" Flat Washers, Brass, Nickel Plated Brass: machinable, ductile, corrosion resistant, excellent electrical and thermal conductivity.The nominal diameter is the bolt size to use for this flat washer.Diameter (Nominal): 1/2"Inside Diameter (Nominal): 9/16"Outside Diameter (Nominal):... $276.33 Select Quantity Compare