A brake part for an armrest mount has an elastically deformable edge strip and a hole adjacent the edge strip. The edge strip is made of a predetermined material and forms a slide surface opposite the hole, and an elastically deformable element formed of a material different from that of the edge strip lies between the edge strip and the hole and supports the strip against deformation in a direction toward the hole. The edge strip and the element are depressable elastically in the direction into an expansion space formed by the hole.