This is one of the countless custom to print stainless steel washers we supply on a revolving blanket purchase order basis - it is a domestic made 18-8 stainless steel flat washer measuring .170 X .500 X .030. Tolerances on the OD are +/-.0050 and the ID is maintained within .170-.177 per the customer specific requirements. The thickness on the washer ranges between .030 and .040 inches.