Besides being used for new installs, brackets like these are commonly used to repair and replace broken, or missing wall brackets. The two-ear brackets have a 2-1/2 in.
. Flange bolts feature a built in washer under the bolt head that helps to distribute the clamping load over a larger area.1, ASME B18.1 A washer is still needed on the nut side unless using a flange nut.