Abstract: A slotted cap for a corner or support post of a fence, particularly a chain link or “Cyclone” (trademark) or “Hurricane” (trademark) fence. In a preferred embodiment, the slotted fence post cap includes a cylindrical cap wall which is mounted on the upper end of the vertical fence post, and a horizontal adjusting slot is fitted on one side and a fixed nipple is fitted on the opposite side of the cap wall. The fixed nipple receives the horizontal top rail of a fixed fence segment or run, and the adjusting slot is fitted with an adjustable nipple which receives the top rail of an adjustable fence segment or run in construction of the fence. The adjustable nipple is typically bolted to the cap wall at the adjusting slot, and the bolt can be loosened to facilitate adjustment of the adjustable nipple and attached adjustable fence segment into a selected angular relationship with respect to the fixed fence segment.