3in RC Plane Spinner
This is a two piece propeller spinner. It's 3in in diameter and has a 5mm shaft hole. It's pretty light compared to commonly available molded plastic ones. I have on installed on a 32 size motor and have dozens of flights. No issues.
Print out the base and the spinner. Tap the base holes with M3 threads. Use M3 x 6-7mm socket head cap screws to hold it together.