Abstract: A hood bumper assembly which may be used, for example, to adjustably align the hood of an automobile with the adjacent fenders as the hood is brought down into locked engagement over the engine compartment. The assembly includes a workpiece, which may be the framework of the engine compartment, having an aperture and a helical internal marginal portion defined around the aperture, and a member having an end with a spherical surface portion arranged to engage the hood when closed and a shank portion including a helical thread adapted to be threadingly received by the aperture. The assembly further includes detent means carried by the shank and the workpiece for releasably locking the shank within the aperture against rotation at predetermined rotational intervals. The spherical surface portion of the member end is arranged to coact with a stamped recess in the underside of the hood to prevent lateral vibration of the hood and to positively locate the hood in proper position when it is closed.