Quick release star knob (M8)

thingiverse

This is a fast release star nut for M8 threaded rods that I use to secure my filament spools so they're easy to swap out.\r\nHow it works: The nut features a concentric and vertical M8 thread, plus an 8.5mm bore-hole located at a 12° angle relative to the M8 axis.\r\nTo install, simply tilt the nut onto the rod and push it through the thread when you're ready to secure your part, then straighten out the nut for a solid hold.