Lathe knob with 7/16 nut

I am a student at Sauk Rapids Rice high school, and on our lathe in the metal shop, the on/off lever knob broke. I designed this to be printed, and after the pocket for a 7/16 inch nut was almost complete, I paused the print, slid the nut in and finished the print.

Materials required
-7/16 inch nut