EXTSW 20 mm ID x 37.84 mm OD x 4.7 mm thick 316 Stainless Washer

EXTSW 21.05 mm ID x 37.84 mm OD x 4.77 mm thick 316 Stainless Washer   21.05 mm ID x 37.84 mm OD x 4.77 mm Thick  (+/- .076 mm on all dimensions)  .828' ID x 1.490" OD x .188" thick          (+/- .003 "on all dimensions)   0.7mm Radius OD / Countersunk ID (no sharp edges)   Made in USA on a CNC latheIt is a beautiful fit for your 20mm Stainless boltsJust contact me if you need a custom size washer.   316 Grade Alloy Stainless contain a higher percentage of nickel than 304SS. The resultant composition gives a much improved corrosion resistance in many aggressive environments. The molybdenum addition ensures more resistance to pitting and crevice corrosion in chloride-containing media, sea water and chemical environments such as sulfuric acid compounds, phosphoric and acetic acids. The lower rate of general corrosion in mildly corrosive environments gives 316 SS a good atmospheric corrosion resistance in polluted marine atmospheres. 316 SS offers good strength and creep resistance an