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EXTSW 20 mm ID x 38 mm OD x 4.7 mm thick 304 Stainless Washer
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(1 pc) extsw 21.05 mm ID x 38 mm OD x 4.77 mm thick 304 Stainless Washer
0.7 mm Radius OD / Countersunk ID (no sharp edges)
21.05 mm ID x 37.84 mm OD x 4.77 mm Thick (+/- .076mm on all dimensions)
.828inch 1.490inch .188inch (+/- .003 on all dimensions)
Made in USA on a CNC lathe
It is a beautiful fit for your 20mm Stainless bolts
Just contact me if you need a custom size washer.