FreeThreaded Rod to Lead Screw Adapter - Made for MakerGear Prusa Mendel may work for others
Thingiverse
12 model
Free
FreeThreaded Muzzle Adapter - Rossi RS22 & Mossberg 702 Plinkster
Thingiverse
FreeThreaded Option for 1/4-20 Adapter for Articulating Camera Mount
Thingiverse
FreeM8 threaded rod to T8 lead screw nut adapter
Thingiverse
FreeBondtech BMG - Mosaic Palette Threaded Adapter Mount
Thingiverse
Free608 bearing to m4 threaded rod adapter
Thingiverse
FreeBosch GEX 125/150 AVE threaded Adapter for 40mm vacuumhose
Thingiverse
FreeM5 Adapter from Brass Nut to 5mm Threaded Rod
Thingiverse
FreeCreality CR-10 V2 Angled Threaded Filler Adapter
Thingiverse
FreeCR-6 SE E3D V6 Hotend Mounting Adapter (Threaded Heatsink)
Thingiverse
Free10-20 to m8 nut adapter for thin threaded z rod
Thingiverse
FreeParametric remake of Hero Me Gen 5 Gantry Adapter 1 for Ender 3/CR-10 (with additional files for threaded inserts)
Thingiverse