Just because it is listed as .25" doesn't mean it IS .25". If you buy a .25" flat washer I guarantee you the center diameter is greater than .25".

M.M.C. and all that GD&T jazz.

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now