This pegboard is injection molded of plastic yielding a unitized flat panel, and rearwardly projecting peripheral flanges and cross webs terminating along a single plane, suited to provide clearance for a cooperating hook between a panel rear face and a flat mounting surface. The pegboard has rows and columns of holes of both nominal ⅛ inch and ¼ inch diameters on one inch centers, to accommodate both conventional nominal size hooks. The respective rows and columns of the different size holes are alternately arranged offset from one another vertically and horizontally, allowing either size hook mounting virtually anywhere on the panel. Locating structures on the rear side of the pegboards provide accurate back to back squared registry positioning of two like pegboards, for cool-down after molding without shape distortion and for stable twin-pack packaging for retail sales.