Toilet Handle Washer

The handle on our toilet kept loosening.  It has a metal retaining nut that would not stay tight against the tank for more than a few days.  So I made this washer which has three features that keeps the handle tight and aligned perfectly:

1. A square extension that keeps the washer aligned to the square hole in the tank.
2. Flats on the opening to keep the handle aligned to the washer.
3. A flange to torque the metal nut against to keep it from loosening.

It's a simple design but it actually worked out extremely well.  The handle stays tight, it feels more precise (lol I know it's just a toilet handle) and, surprisingly, the flapper always shuts 100% of the time now so we no longer have to jiggle the handle.

FreeCAD source included in case you need to change dimensions for your situation.

Printed in white PLA+, 0.2mm layers, nothing special.