Precision Fabrication Its important for you to know that the flat washers and custom metal stampings you get from Bokers are going to meet your specifications. From the first part to the last... time after time. Those......Precision Fabrication Its important for you to know that the flat washers and custom metal stampings you get from Bokers are going to meet your specifications. From the first part to the last... time after time. Those arent just words at Bokers, but the goal of the quality-conscious personnel who produce your precision metal stamping parts with tolerances as close as the specifications demand, and sometimes even closer. Metallic flat washers and spacers are flat, tumble deburred, and can be heat treated or plated. As a final check, your parts are sent to the inspection department before your custom metal stamping order is shipped.