EXTSW 3/8” ID x 7/8” OD x 1/4” thick 304 Beveled stainless washer
Actual size .383" ID x 865” OD x .250" thick
(+/- .003" on all dimensions)
.030 inch Radius OD / slightly countersunk ID (no sharp edges)
Made in USA. 304 Stainless has the very GOOD corrosion resistance.