EXTSW (5/16”/ .330" ID) x (5/8”/ .615" OD) x .107" thick 316 Stainless Washer

EXTSW (5/16”/ .330" ID) x (5/8”/ .615" OD) x .107" thick 316 Stainless Washer

Actual size .330" ID x .615” OD x .107" 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.