FASTENING DEVICE FOR CONNECTING A RAIL ELEMENT TO A STRUCTUAL ELEMENT OF A VEHICLE, AND RAIL ELEMENT

A fastening device for a rail element of a longitudinal adjustment device may have at least one securing washer with a through-opening and a bolt with at least one external thread. The bolt is pre-fixed and held in the through-opening by self-locking. The securing washer has a first strength and the bolt has a second strength.