EXTSW 5/16” ID x 1 3/4” OD x 1/4” Thick 316 Alloy Stainless Washers 
Actual dimensions .323" ID x .1.740" OD x .250" Thick 
(+/- .003" on all dimensions) 
.030 inch Radius OD / slightly countersunk ID (no sharp edges)
Made in USA. 316 Stainless has the ULTIMATE corrosion resistance.