A wear member of a mechanically attached wear plate system having a mounting base for attachment to a wear surface and a retainer member adapted to retain the wear member in an engaged position on the mounting base. The wear member is coupled to the mounting base by a rotary movement to engage an engagement surface of a dovetail flange extending from a wear member mounting side with a mounting base engagement surface. Abutment surfaces of the wear member and mounting base are disposed abutting opposite sides of the retainer member positioned in the retainer opening of the mounting base.
