Flat round washers are the mainstay of the washer business. Gates manufactures to your specifications, OD, ID, Thickness, Material and Finish. Please keep in mind that Gates parts are always tumbled and clean, something that some competitors charge extra for!
Gates routinely produces flat washers from 0.125" to 4.000" OD, 0.0005" to 0.135" thick. Orders range from 100 to 10,000,000 pieces.