EXTSW Stepped 5/16"/ 8.3 mm ID x 15 mm/.589" OD x .787"/ 20 mm overall length

EXTSW  5/16 / 8.3 mm ID x 15 mm/.589" OD x .787"/ 20 mm overall length

Actual size .323” ID x .787” OD x .787” thick

Flange size is .787" OD x .079" Thick

Stepped .589 x .708"

Overall length 20 mm / .787"

(+/- .003 on ID, Flange OD and thickness and overall length dimensions)

(+.000/-.001 on 15 mm OD)

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

Made in USA on a CNC lathe

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.