Front rail nut. Left. Right. A Nut used to retain the Frame Side Member to it's mounting point. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Instrument Panel CrossMember. Bumper Impact Bar Nut. Blind Rivet. Bumper Impact Bar. Frame Side Member. Instrument Panel CrossMember. Rail. REINFORCED beam lock. Included with: Reinforcement beam.