EXTSW 1/2” ID x 1 5/8” OD x 1/4” Thick 316 Alloy Stainless Washers Actual dimensions .507 ID x .1.615 OD x .250 Thick(+/-.003 on all dimensions)Made in USA on a CNC latheIt is a beautiful fit for your 1/2“ Stainless boltsWe can make as many as you need, just contact me.316 Stainless Alloy is weldable and has the ULTIMATE corrosion resistance. 316 alloy cost more than 18-8, 303 and 304 and takes more time to drill and machine than the other alloys, but it is the best. Grade 316 is the standard molybdenum-bearing grade The molybdenum gives 3