Not from your rig. Too clean and shiny. Plus a bolt of that size would be torque sensitive on our rigs which means it would like have the factory color marker (purple, yellow, green, etc...) marks indicating it has been properly torqued/tightened.
Looks straight out of Home Depot hardware isle.
Belts sometimes make a little noise at startup, new rig settling in maybe. If it were loose pulley/tensioner it would not go away after a minute.