Left.W/O SPORT. Lower. Right.W/O SPORT. Strut nut. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Suspension Leaf Spring. Lateral Arm Nut. Part cannot be reused/reinstalled. Suspension Control Arm Nut. Suspension Strut Nut. Suspension Trailing Arm Nut.