Genuine Mercedes-Benz M10 Hex Nut with Flange for Belt Tensioner Pulley, 003 990 07 50
- This is a new Genuine Mercedes-Benz flange nut.
- This is for the belt tensioner pulley.
- This is used on select models of the 1998 - 2004 SLK230 & 1996 - 1997 E320, PLEASE see the application fitment table to confirm fit.