EXTSW 5/16” ID x( 5/8”/.615" OD) x 1/4” thick 316 Stainless Washer

EXTSW 5/16” ID x 5/8” OD x 1/4” thick 316 alloy stainless washer

Actual size .323" ID x .615” OD x .250" thick 
(+/- .003" on all dimensions)

.030 inch Radius OD / Countersunk ID (no sharp edges)

Made in USA on a CNC lathe

It is a beautiful fit for your 5/16” Stainless bolts

Just contact me if you need a custom size washer.
Some other websites will list their washers as "18-8" or just "stainless steel".


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.