Edit 7/18/2024:

I had one of these mounts fail after nearly 2 years of use. It was right at the bottom corner wall seam, so I have added a filleted version that should help accomodate the stress in that area. 

Edit: Added Fusion 360 workfile and stls for the mounts I used for Daredevil's clubs. The club mounts should fit together and hold in place without glue as long as your printer is well tuned and prints with tight tolerances. 

All the wall mounts I could find were either overly complicated, took way too long to print, or just weren't designed well. 

This is a simple, strong wall mount for 3d printed helmets that can be printed in approximately 11 hours with .2 layer height. 

No glue is required, and the half-ball shape should fit securely on the hook

You can mount it using standard nails, and it should support cosplay helmets of most weights.