EXTSW 20.7 mm ID x 50.5 mm OD x 6.3 mm thick 316 Stainless Washer

EXTSW 20.7 mm ID x 50.5 mm OD x 6.3 mm thick 316 Stainless Washer 20.7mm / .815"inch ID x 50.5 mm / 1.990" OD x 6.35 mm/ .250" Thick (+/- .003 on all dimensions) It is a beautiful fit for your 20mm Stainless bolts Just 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 and also possesses excellent mechanical and corrosion-resistant properties at sub-zero temperatures.