Abstract: The invention relates to a Hanged hillside washer assembly that is used to mount bracing rods on metal building frames. The flanged hillside washer assembly includes a Mange portion and a hillside washer portion. The flange portion has a flat base on one end. an upper surface and a channel passing therethrough. The channel passing through the hillside washer portion and the flange portion has a breadth dimension and a width dimension over its length, the breadth varying over its length, and the width of the channel being substantially constant over at least a portion of its length sufficient to limit widthwise movement of a mating rod within the channel.