2807 Series Stainless Steel Shim (4mm ID x 7mm OD, 0.25mm Thickness) - 12 Pack

These 0.25mm thick stainless steel shims are intended to provide a small amount of necessary space between components in your assembly.  While shims are typically associated with a shaft in a rotating assembly, there are also times where a plate or bracket needs bumped just a smidge from its natural mounting location, and that’s where these come into play.  Given the ID is 4mm, they work great on M4 screws.