Apply Threadlocker to Set Screw

What happens here

It is discovered that a set screw on the idler pulley is missing. Obtain a new 5/16-inch, 18-thread, 1/2-inch long set screw. Apply a few drops of Loctite Blue threadlocker to the new set screw. Carefully install and tighten the set screw into its designated hole on the idler pulley. This helps prevent the set screw from vibrating loose again.

Goal: Secure the idler pulley set screw to prevent future loosening.