Quick view #8, ID=0.172", OD=0.375", THK=0.036" Flat Washers, Brass 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): #8Inside Diameter (Nominal): 0.172"Outside Diameter (Nominal): 0... $36.21 Compare