I've designed these simple hooks to get all my family members' helmets on a wall. It uses <15g of filament, prints in <20 minutes and can hold any helmet out there (within reasons – I am looking at you, medieval armory fans!).

Printing on the side gives it strength in the direction it's pulled. I designed it for 4-6mm diameter screws with V heads.

There are two versions on the same plate: one with and one without the accessory hook. Remove the one you don't neet. I use the hook for laniards, etc.