Parametric Knob for Nuts, Threaded Knob (Fusion 360)

Parametric model of a threaded knob, and one for inserting a standard nut to use steel threads.  Very easy to print, standard size is 50mm and there's a 25mm smaller variant for tight spaces.  Base model is sized for a slight press fit for a standard ¼"-20 nut or bolt head.  Can be glued in place for additional hold, but not needed.  

Printed in Inland PLA using a 0.4mm nozzle.  Use at least 4 walls to get more strength under the bolt head/nut.