Left. Right. Uniside assy nut lock. A fastener which consists of a shaft and a head on one end, and when the shaft end is installed it expands and holds the Uniside in place. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Aperture Panel. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Quarter Panel. Rocker Panel Molding Nut. ASSEMBLY lock. Aperture rivet. Quarter. Rocker molding. Included with: Uniside.