EXTSW 1/2" ID x 1 5/16" OD x 1" thick 316 stainless spacer
Actual size .507" ID x 1.313" OD x 1.000" thick
(+/-.003" on all dimensions)
.030" radius OD / slightly countersunk ID (no sharp edges)
Made in the USA. 316 Stainless has the ULTIMATE corrosion resistance.