EXTSW 3/4” / .757" ID x 1 5/8” OD x 1/8” thick 316 stainless Washer
Actual size .757" ID x 1.615” OD x .125" 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.