Abstract: A cover for a bolt and an annular nut having a plurality of generally planar, side surfaces. The cover includes: a shell having a closed end portion and a plurality of side surfaces extending downwardly from the closed end portion, an interior portion of said side surfaces being threaded; and a clip for inserting into the aforementioned shell. The clip includes an annular ring and a plurality of spaced projections extending downwardly from the ring, each projection having exterior threads for engaging with the threaded interior of the shell. Preferably, interior portions of each downward clip projection has a substantially planar surface for engaging with the sides of a lug nut over which this cover is installed.