Self-locking nut

Listed on the following equipment:
Technogym - Element Dual Adjust Pulley (DAP) - MB43
Technogym - Excite Run 700 - D447EE
Technogym - Excite Run 700 - D447UE
Technogym - Run 500AT (D445EL-D445UL)
Technogym - Run 600 XT Pro
Technogym - Run 700 & 900 WTV DIGITAL 110V - 700 & 900
Technogym - Run 700 & 900 WTV DIGITAL 110V - 700 & 900
Technogym - Run 700 & 900 WTV DIGITAL 110V - 700 & 900
Technogym - Run 700 & 900 WTV DIGITAL 110V - 700 & 900
Technogym - Run 700 & 900 WTV DIGITAL 110V - 700 & 900 - (D448UD)
Technogym - Run 700 & 900 WTV DIGITAL 110V - 700 & 900 - (D449UD)
Technogym - Run 700 & 900 WTV DIGITAL 110V - 700 & 900 - (D477UD)
Technogym - Run 700 & 900 WTV DIGITAL 110V - 700 & 900 - (DA48UD)
Technogym - Run 700 & 900 WTV DIGITAL 110V - 700 & 900 - (DA49UD)
Technogym - Run 700 & 900 WTV DIGITAL 220V - 700 & 900
Technogym - Run 700 & 900 WTV DIGITAL 220V - 700 & 900
Technogym - Run 700 & 900 WTV DIGITAL 220V - 700 & 900 - (D448ED)
Technogym - Run 700 & 900 WTV DIGITAL 220V - 700 & 900 - (D449ED)
Technogym - Run 700 & 900 WTV DIGITAL 220V - 700 & 900 - (D477ED)
Technogym - Run 700 & 900 WTV DIGITAL 220V - 700 & 900 - (DA48ED)
Technogym - Run 700 & 900 WTV DIGITAL 220V - 700 & 900 - (DA49ED)
Technogym - Run 700 - D447EL
Technogym - Run 700 - D447UL
Technogym - Run Excite 500
Technogym - Run Excite 700
Technogym - Run XT - D240U
Technogym - Run XT - D241U
Technogym - Run XT - D242U
Technogym - Run XT - D243U
Technogym - Spin Trainer - D250U

* Images may not be identical to part.